Suppose your statistics professor reports test grades as z-scores, and you got a score of 2.20 on

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Answer 1
This means that you got 2.2 standard deviations above the mean... This is certainly good, but the measure of exactly how good it is depends on the mean, and 1 standard deviation. 

Related Questions

figure ABCD is a rectangle with point A (-2, 5). What rule would rotate the figure 90 degree clockwise?

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(x,y)-->(y,-x)

Point A:(-2,5)-->(5,2)

i have forgotten how to share a number into ratio!! help please!

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[tex]\bf 150\div (1+4+5)\implies 150\div 10\implies \boxed{15} \\\\\\ \stackrel{1\cdot 15\textit{ ratio of 1}}{15}~~:~~\stackrel{4\cdot 15\textit{ ratio of 4}}{60}~~:~~\stackrel{5\cdot 15\textit{ ratio of 5}}{75}[/tex]


15 + 60 + 75 = 150

2w-5w=27 can you tell me how to solve this to where I can understand

Answers

Combine like terms.  In other words, combine 2w - 5w:  the correct result is -3w.
                                                                                       
                                                                                       27
Now equate -3w to 27 and solve for w:  -3w = 27; w = ------ = -9 (answer)
                                                                                       -3

The price of stamps just increased by $0.03. Beth wants to send out 30 party invitations. Write a formula that will help her determine how much it will cost. Let’s let p=old price per stamp
t=total cost for stamps

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t = 30 ( 0.03 + p )
hope it helps
the answer would be t=30x0.03p im pretty sure

the difference of 9 and the square of a number

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The difference of 9 and the square of a number 

9 - n^2

Recall that you can use the built-in functions rem(m,n) or mod(m,n)to find the remainder of the division m/n.

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the answer is B hope this helped
Final answer:

The 'rem(m, n)' and 'mod(m, n)' methods in mathematics provide the remainder of the division operation m / n. When dealing with numbers in exponential form, you divide the base numbers and subtract the exponents to simplify the terms. An understanding of these operations is essential for solving more complex equations.

Explanation:

In mathematics, there are two ways to find the remainder of a division operation: rem(m,n) or mod(m,n). These functions take two numbers m and n, and return the remainder when m is divided by n.

For example, in the case of 106 divided by 103, you would first divide the 'base' numbers (10/10) which equals 1, and then subtract the exponents (6-3) which equals 3. So, the result is 103 or 1000. Another example is 4.5 x 109 divided by 103. Here, first you divide 4.5 by 1 (since 10/10 = 1) and then subtract 9-3 equals 6. Therefore, the answer is (4.5) x 106.

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Students in a class were asked to name their favorite flavor of ice cream. The results are shown in the circle graph. How many times more students prefer cookies and cream than prefer strawberry?

Cookies and Cream: 18%
Strawberry: 2%
Cookie Dough: 35%
Vanilla: 25%
Chocolate Chip: 20%

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9 Times, hopes this helped

Answer: 9 times

Step-by-step explanation:

Let the total number students be x.

Then the number of students liked cookies and cream = 18% of x= 0.18 x

The number of strawberry = 2% of x = 0.02 x

Clearly, 0.18 x> 0.02 x

The number of times more students prefer cookies and cream than prefer strawberry =[tex]=\frac{0.18x}{0.02x}=9[/tex]

Hence, The students prefer 9 times cookies and cream than prefer strawberry.

64 is 55% of what number

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If 64 is 55% of a number, since 55%=0.55 (by dividing it by 100), we have 0.55*x=64. Dividing both sides by 0.55, we get 64/0.55=x=106+36/99=106+12/33 by dividing both the numerator and denominator by 3.

For repeating decimals, if it repeats every 2 digits, like 0.363636, we have (the digits that repeat)/99


Feel free to ask any further questions!

What is 0.003 of 1/10 as much as

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The answer to this is 0.03

The formula f 5280m can be used to convert a measurement of f feet to an equivalent measurement of m miles. If an airplane flies at 21,120 feet above the ground, how much is that in miles?

4 miles?

5.3 miles?

111,513,600 miles?

132,620,600 miles?

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The formula is f = 5280m

It means that every mile has to be multiplied by 5280 to connvert into equivalen number of feet.

Now you need to find the number of miles equivalent to 21,120 feet, so solve the equation f = 5280m for m:

f = 5280m => m = f / 5280

=> m = 21120 / 5280 = 4

=> Answer: 4 miles

Jim is helping his dad cook hamburgers for his family and friends. There are 15 people. Each person wants two hamburgers. Three people want hamburgers with cheese. Two people want hamburgers with mustard. Two people want hamburgers with catsup. The rest want them plain. How many plain hamburgers will Jim and his dad make?
A: 8
B:16
C:21
D:23

Answers

The number of people who do not want plain hamburgers is 3+2+2 = 7, so 15-7 = 8 people want plain hamburgers. Each person wants 2 hamburgers, for a total of ...

... B: 16

plain hamburgers.

Final answer:

Jim and his dad will make 23 plain hamburgers.

Explanation:

To find the number of plain hamburgers Jim and his dad will make, we need to subtract the number of hamburgers with special toppings from the total number of hamburgers. There are 15 people in total, and each person wants 2 hamburgers, so Jim and his dad need to make 15 x 2 = 30 hamburgers in total.

Out of the 30 hamburgers, 3 people want hamburgers with cheese, 2 people want hamburgers with mustard, and 2 people want hamburgers with catsup. Therefore, the total number of hamburgers with special toppings is 3 + 2 + 2 = 7 hamburgers.

Subtracting the number of hamburgers with special toppings from the total number of hamburgers, we get 30 - 7 = 23 plain hamburgers. Therefore, Jim and his dad will make 23 plain hamburgers.

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For the past 7 years, George and Sue have deposited $10,000 in a retirement account with a simple interest rate of 4%. They plan to continue to make annual deposits for the next 15 years. Explain how their money will grow over time. Note: You do not need to extend their entire savings for 22 years in your explanation. Focus on the earning for the first several years and explain how their money will grow.

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George and Sue's money will grow due to both to their contributions and the simple interest that they accrue. Simple interest means that the interest they receive will be applied to the principle, but not the interest that has been accrued. This means that for every $10,000 they put in, they will receive $400 dollars in interest every year, and this number will not change with time.

Right now, they've deposited 10,000 every 7 years for a total of 70,000 dollars. Their annual interest therefore is 400 * 7 = 2800. With every 10,000 dollars they deposit, the yearly interest will grow by $400. This is different from compounding interest, in which annual interest will grow by more than $400 dollars every year since the rate will be applied to principle and all accrued interest. 

Answer:

George and Sue's money will grow due to both to their contributions and the simple interest that they accrue. Simple interest means that the interest they receive will be applied to the principle, but not the interest that has been accrued. This means that for every $10,000 they put in, they will receive $400 dollars in interest every year, and this number will not change with time.

Right now, they've deposited 10,000 every 7 years for a total of 70,000 dollars. Their annual interest therefore is 400 * 7 = 2800. With every 10,000 dollars they deposit, the yearly interest will grow by $400. This is different from compounding interest, in which annual interest will grow by more than $400 dollars every year since the rate will be applied to principle and all accrued interest.

Step-by-step explanation:

A high rise building has a sink on the fourth floor located 2-feet above the floor. Each floor is 10-feet above the other. Calculate the psi at the sink where when the street pressure is 80 psi. The building does not have a pressure reducing device due to fire codes.

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The pressure at a certain height is the pressure at sea level plus the hydrostatic pressure.

P = 80 psi + ΔP
where
ΔP = ρgh
ρ is the density of water equal to 62.4 lbm/ft³
ΔP = (62.4 lbm/ft³)(1 lbf/lbm)(4*10 + 2 ft)(1 ft/12 in)² = 18.2 psi

Thus,
P = 80 + 18.2
P = 98.2 psi

Find the complete factorization of the expression.

10xyz + 24xy + 6xz
A) xyz(5 + 12 + 3)
B) 2x(5zy + 12y + 3z)
C) x(10zy + 24y + 6z)
D) 2(5xzy + 12xy + 3xz)

Answers

it well be B.) they all have a factor of 2

Answer:

B) 2x(5zy + 12y + 3z)

Step-by-step explanation:

First, all coefficient for each term are a pair number, therefor 2 is common factor for all these

[tex]10xyz + 24xy + 6xz=>2(5zxy + 12xy + 3xz )[/tex]

then, the variable X is present for each term of the funtion [tex](5zxy + 12xy + 3xz)[/tex], so, the variable X is a common factor to.

[tex]2(5zxy + 12xy + 3xz )=> 2x(5zy + 12y + 3z )[/tex]

the shop has 1260 ounces of cranberry juice and 650 ounces of passion fruit juice.ifvthe juices are used to make crazy cranberry smoothies, which juice will run out first?how much of the other juice will be left over?

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Given:
Each smoothie requires 20 ounces of cranberry juice and 10 ounces of passion fruit.
There are 1260 ounces of cranberry juice.
There are 650 ounces of passion fruit juice.

For the maximum servings of the smoothie, let
x = the number of 20-ounce cranberry juice used,
y = the number of 10-ounce passion fruit juice used.

The cranberry juice runs out when
20x = 1260
x = 63  servings 

The passion fruit juice runs out when
10y = 650
y = 65 servings

Because x reaches, the cranberry juice runs out first after 63 servings of the smoothie.
There will be two 10-ounces = 20 ounces of the passion fruit left.

Answer: 
(a) The cranberry juice runs our first.
(b) There will be 20 ounces of the passion fruit left over.

Square EFGH has vertices: E = (-1,1), F = (-1,2), G = (-2,1), H = (-2, 2). In which quadrant will the image of vertex E' be if the square is rotated 270° clockwise about the origin O?

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If we were to imagine a single point (1,1) which is in quadrant 1, and we rotate it 90o then we get a negative x. Another 90o then both x and y is negative. another 90 (270) and we get a negative y.

thus:

(e)(f)(g)(h) = (-1,-1)(-1,-2)(-2,-1)(-2,-2)

Answer:

Quadrant III

Step-by-step explanation:

Did this lesson, just checked the answer key.

What is 0.650 , 0.065 , 0.605 , 0.560 in least to greatest

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0.065 0.560 0.605 0.650

hope this helps

A towns population went from 25.800 to 42,600 in 15 years. What was the percent increase?

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if we take 42600 as the 100%, how much is in percentage off of it, 25800?

[tex]\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 42600&100\\ 25800&p \end{array}\implies \cfrac{42600}{25800}=\cfrac{100}{p}\implies p=\cfrac{25800\cdot 100}{42600}[/tex]

What is 225 percent as a decimal or fraction in simpilist form

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225/100

225 ÷ 25 = 9
100 ÷ 25 = 4

So, 225% as a fraction in it's simplest form would be 9/4

If you want 225% as a decimal:

225/100
225 ÷ 100 = 2.25

So, 225% as a decimal in its simplest form would be 2.25


I really hope this helped you! c:

The distance to the first delivery is 12 1/3miles. The distance between the next three delivery is is 8 3/4 miles, 17 2/8 miles, and 23 2/3 miles respectiviely. The distance from the final delivery to the shop is 10 5/10 miles. What is average distance for all segments of this trip?

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the average value of something, is the (sum of the data elements) / (how many elements).

for example, in this case we have 5 elements, 5 delivery distances, so the average distance for them will be, their sum divided by 5, so let's do so them, firstly changing the mixed fractions to "improper" fractions,

[tex]\bf \stackrel{mixed}{12\frac{1}{3}}\implies \cfrac{12\cdot 3+1}{3}\implies \stackrel{improper}{\cfrac{37}{3}} \\\\\\ \stackrel{mixed}{8\frac{3}{4}}\implies \cfrac{8\cdot 4+3}{4}\implies \stackrel{improper}{\cfrac{35}{4}} \\\\\\ \stackrel{mixed}{17\frac{2}{8}}\implies \cfrac{17\cdot 8+2}{8}\implies \stackrel{improper}{\cfrac{138}{8}} \\\\\\ \stackrel{mixed}{23\frac{2}{3}}\implies \cfrac{23\cdot 3+2}{3}\implies \stackrel{improper}{\cfrac{71}{3}}[/tex]

[tex]\bf \stackrel{mixed}{10}\frac{5}{10}\implies \cfrac{10\cdot 10+5}{10}\implies \stackrel{improper}{\cfrac{105}{10}}\\\\ -------------------------------\\\\\\[/tex]

now, let's add them up, and divide by 5,

[tex]\bf \cfrac{\frac{37}{3}+\frac{35}{4}+\frac{138}{8}+\frac{71}{3}+\frac{105}{10}}{5}\impliedby \textit{so our LCD is 120 above} \\\\\\ \cfrac{\frac{1480+1050+2070+2840+1260}{120}}{5}\implies \cfrac{\frac{8700}{120}}{5}\implies \cfrac{\frac{145}{2}}{5}\implies \cfrac{\frac{145}{2}}{\frac{5}{1}} \\\\\\ \cfrac{145}{2}\cdot \cfrac{1}{5}\implies \cfrac{145}{10}\implies \cfrac{29}{2}\implies 14\frac{1}{2}[/tex]

There is a sales tax of $6 on an item that costs $88 before tax and. The sales tax on a second item is $21. How much does the second item cost before tax

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88 + 88 is the answer

0.06 is 10 times as much as 0.600

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No. 0.06 is 10 times 0.006. 0.6 is 10 times 0.06.

No 0.600 is 10 times the amount of 0.06.

1. A pool company is trying out several new drains. Drain A empties a pool at a rate of 2 gal/min. Drain B empties a pool at a rate of 5 gal/min. One pool has 108 gal of water in it. Write an equation for each drain that shows the amount of time it takes to empty the pool. Then solve each equation showing your work.

Answers

The equations we can create is based from this equation:

time = volume of pool / rate

 

Drain A: time = 108 gal / (2 gal / min) = 54 min

Drain B: time = 108 gal / (5 gal / min) = 21.6 min

Kira is saving money to buy a bike that costs $133 . She has $42 and will save an additional $7 each week. In how many weeks will she have enough money to buy the bike?

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She would have to work 13 weeks. The way you get it is subtracting $42 from $133 to get $91 then dividing by $7 you get 13. So that should be the right answer 

An implicit equation for the plane passing through the point (-1,-4,5) that is perpendicular to the line l(t) = <1+2t,1+t,5+3t> is

Answers

Final answer:

The implicit equation of the plane is 2x + y + 3z - 14 = 0, found using the direction vector of the line as the normal vector for the plane and the given point to determine the specific plane equation.

Explanation:

To find an implicit equation for the plane passing through the given point (-1,-4,5) and perpendicular to the given line, we need to determine the direction vector of the line which will also serve as the normal vector to the plane. The equation of the line is given as l(t) = <1+2t, 1+t, 5+3t>, which suggests that the directional vector of the line (and thus the normal vector of the plane) is <2, 1, 3>.

Now, the general equation of a plane in 3D space can be given by Ax + By + Cz + D = 0, where <A, B, C> is the normal vector to the plane. Thus, substituting the normal vector and the given point into this equation will allow us to find the value of D and hence the implicit equation of the plane. In this case, the equation is given by:

2(x + 1) + 1(y + 4) + 3(z - 5) = 0, simplifying this gives:

2x + y + 3z - 14 = 0,

which is the implicit equation of the desired plane.

Final answer:

The implicit equation of the plane passing through the point (-1, -4, 5) and perpendicular to the line ℒ(t) is 2x + y + 3z - 9 = 0.

Explanation:

To find an implicit equation for a plane that is perpendicular to a given line, we first need the direction vector of the line. The line ℒ(t) = <1+2t, 1+t, 5+3t> has a direction vector of <2, 1, 3>, which also serves as the normal vector of the plane. The normal vector (A, B, C) and a point (x0, y0, z0) on the plane can provide an equation via the dot product: A(x - x0) + B(y - y0) + C(z - z0) = 0.

For the given point (-1, -4, 5), the equation becomes 2(x + 1) + 1(y + 4) + 3(z - 5) = 0. Simplifying, we get:

2x + 2 + y + 4 + 3z - 15 = 0

2x + y + 3z - 9 = 0

This is the implicit equation of the plane that passes through the point (-1, -4, 5) and is perpendicular to the given line.

how many shelves will display 2 cars if 8 of the shelves each display 1 car

Answers

1 car needs 8 shelves. You need to know how many for 2 cars, so 8 x 2 = 16

To determine the number of shelves that will display 2 cars each when 8 shelves display 1 car each, simply divide 8 by 2. The answer is 4 shelves.

To solve this problem, we'll use basic arithmetic. If each of the 8 shelves displays 1 car, then to display 2 cars on a shelf, we would need to combine pairs of shelves. This means we would take the 8 shelves, and divide by 2 cars per shelf to find the number of shelves needed for 2 cars each. So, 8 shelves divided by 2 cars per shelf equals 4 shelves.

Therefore, the answer is that 4 shelves will display 2 cars each if there were originally 8 shelves with 1 car each.

what is 75% of 400? Write an evaluate an expression to find the answer. Then explain how to use the model to justify the answer

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Answer:

Step-by-step explanation: love your self

ray is 23 years older than his sister Carol. in 20 years he will be twice as old as Carol. how old is each of them now?

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 r = c+23 

r+20 = 2(c+20) 
(c+23)+20 = 2(c+20) 
c+43 = 2c+40 
c = 3 : r = c+23 = 26

Carol is 3 years of age, and Ray is 26 years of age.


Ray is going to be 86 and Carol is 43.
23+20=43 x 2=86 
86/2=43

which choice correctly expresses the number below in scientific notation

Answers

Its C. 4.31 x 10^-5 = 0.0000431

I am having difficulty solving this problem

Answers

[tex]\bf \textit{area of this square}\\\\ A=s^2\qquad \boxed{s=42}\implies A=42^2\implies A=\stackrel{inches}{1764}\\\\ -------------------------------\\\\ \textit{area for this rectangle}\\\\ A=lw\quad \begin{cases} w=26\\ l=73\frac{2}{3}\\\\ \qquad \frac{73\cdot 3+2}{3}\\\\ \qquad \frac{221}{3} \end{cases}\implies A=\cfrac{221}{3}\cdot 26\implies A=\cfrac{5746}{3} \\\\\\ A=\stackrel{inches}{1915\frac{1}{3}}\\\\ -------------------------------\\\\[/tex]

[tex]\bf \textit{area for this circle}\\\\ A=\pi r^2\quad \begin{cases} diameter=36\\ r=radius=\frac{diameter}{2}\\ r=18 \end{cases}\implies A=\pi 18^2\implies A=324\pi \\\\\\ A\approx \stackrel{inches}{1017.876019763}[/tex]
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