Amy is doing a science experiment on how a certain bacterium reacts to an antibiotic. She has 3 dishes of identical bacterium samples with 17 bacteria in each dish. She gives an antibiotic to all of the bacteria in one dish. All of the treated bacteria died, and the bacteria in the other two dishes survived. Is there a sampling bias in the situation above? A. There is not enough information. B. Yes. The antibiotic may not work on the other bacteria. C. Yes. The bacteria in the other 2 dishes are different than the treated bacteria. D. No. All 3 dishes are filled with the same number of identical bacteria.
The table shows the outputs y for different inputs x:
Input
(x) 3 7 11 15
Output
(y) 4 6 8 10
Part A: Do the data in this table represent a function? Justify your answer. (3 points)
Part B: Compare the data in the table with the relation f(x) = 5x – 21. Which relation has a greater value when x = 11? (2 points)
Part C: Using the relation in Part B, what is the value of x if f(x) = 99? (5 points)
(10 points)
Answer:24
Step-by-step explanation:
the primary advantage of a stratified random sample is that it ____.
martha and mary had 375 jelly beans in all. after mary ate 24 jelly beans and martha ate 1/7 of her jelly beans, they each had the same number of jelly beans left. how many jelly beans did each girl have at first?
Jonathan bought a new computer for $1,728 using the electronics store's finance plan. He will pay $96 a month for 18 months. Which equation can Jonathan use to find out how much money he still owes after each month of the plan?
Answer:
[tex]y=1728-96x[/tex]
Step-by-step explanation:
Given : Cost of computer = $1728
He will pay $96 a month for 18 months.
To Find: Which equation can Jonathan use to find out how much money he still owes after each month of the plan?
Solution:
He pays per month = $96
Let the number of months be x
So, He pays in x months = 96x
Since the total Cost of computer is $1728
So, amount left to be paid = [tex]1728-96x[/tex]
Let y be the unpaid amount after x months
So, equation becomes : [tex]y=1728-96x[/tex]
Hence An equation can Jonathan use to find out how much money he still owes after each month of the plan is [tex]y=1728-96x[/tex]
An electronic product contains 40 integrated circuits. the probability that any integrated circuit is defective is 0.01, and the integrated circuits are independent. the product operates only if there are no defective integrated circuits. what is the probability that the product operates?
Final answer:
The probability that the product operates is 0.6706 or 67.06%.
Explanation:
To find the probability that the product operates, we need to find the probability that all 40 integrated circuits are not defective. Since the probability of any integrated circuit being defective is 0.01, the probability that a circuit is not defective is 1 - 0.01 = 0.99. Since the integrated circuits are independent, we can multiply the probabilities together:
P(product operates) = (0.99)⁴⁰ = 0.6706
Therefore, the probability that the product operates is 0.6706 or 67.06%.
Find the volume of this figure to the nearest whole number. Use 3.14 for pi. Please help me!!
volume of square middle = 12 x 12 x 7 = 1008
if you put the 2 ends together it would be a cylinder so volume for that is:
3.14 x 6^2 x 7 = 791.28
1008 + 791.28 = 1799.28 round it off to 1800 mm^3
So D is the correct answer
Answer:
4th option is correct.
Step-by-step explanation:
Here in the given image, we can see that there can be 2 figures if separated. A cuboid with dimensions 12*12*7 and a cylinder with radius as 6 mm and height as 7 mm.
We will first find the volume of cuboid.
V = [tex]12\times12\times7[/tex] = 1008 cubic mm
Now, volume of cylinder is given as : [tex]\pi r^{2} h[/tex]
[tex]3.14\times6^{2}\times7[/tex] = 791.28 cubic mm
Now adding both the volumes to get the volume of complete figure:
V = [tex]1008+791.28=1799.28[/tex] cubic mm
Now this value is closest to option 4th : 1800 cubic mm.
Therefore, last option is true.
If p is a positive integer,then p(p+1)(p-1) is always divisible by?
I am not quite sure what the choices are, but the answer to that problem is:
If p is a positive integer, then p(p+1)(p-1) is always divisible by “an even number”.
The explanation to this is that whatever number you input to that equation, the answer will always be an even number. This is due to the expression p(p+1)(p-1) which always result in a even product.
For example if p=3, then (p+1)(p-1) becomes (4)(2) giving you a even number.
And if for example if p=2, then (p+1)(p-1) becomes (3)(1) which gives an odd product, but we still have to multiply this with p therefore 2*3 = 6 which is even product. The outcome is always even number.
Answer: From the choices, select the even number
Final answer:
If p is a positive integer, p(p+1)(p-1) is always divisible by 3.
Explanation:
If p is a positive integer, then p(p+1)(p-1) is always divisible by 3.
This can be proven by applying the property of divisibility by 3. According to this property, a number is divisible by 3 if and only if the sum of its digits is divisible by 3.
In the expression p(p+1)(p-1), the three terms p, (p+1), and (p-1) represent three consecutive numbers. Since the sum of the digits of any consecutive numbers is always divisible by 3, the expression is always divisible by 3.
3/10, 0.222, 3/5, 0.53 in order from greastest to least
A medium sized apple weighs 130 grams. How many apples are there in 1 kilogram?
Answer:
7
Step-by-step explanation:
A bag contains 6 poker chips, one is red and the other 5 are blue. you and a friend take turns selecting a chip at random from the bag. the first person to get the red chip is the winner. find the probability that you win if you go first and
Final answer:
The probability that you win if you go first is calculated as a sum of an infinite geometric series considering the odds of drawing the red chip in the first or subsequent rounds and is found to be 1/2.
Explanation:
The probability that you win the game if you go first can be found by considering the possibilities of either drawing the red chip on your first turn or on subsequent turns after both you and your friend did not draw the red chip in the previous rounds. In the first round, you have a 1/6 chance of picking the red chip and winning immediately. If you don't draw the red chip, then your friend has a 1/5 chance of drawing it on their first turn, assuming you drew a blue chip.
If both of you fail to draw the red chip on the first turn, the situation repeats with you having another chance to win with the same odds as your first turn. Since this can go on indefinitely, the probability of you winning can be expressed as a geometric series:
P(you win) = 1/6 + (5/6)(4/5)(1/6) + (5/6)^2(4/5)^2(1/6) + ...
This series can be summed up using the formula for the sum of an infinite geometric series a/(1-r), where a is the first term of the series (1/6 in this case), and r is the common ratio ((5/6)(4/5)). The common ratio can be simplified to (4/6) or (2/3), and the sum of the series gives us the final probability. Therefore, the probability that you win the game if you go first is:
P(you win) = 1/6 / (1 - (2/3)) = 1/6 / (1/3) = 1/2.
Which one of the following pairs of terms is composed of like terms? A. 2a, 2b B. –3x, +3y C. abc, cab D. 4mn, 3my
Answer:
Option C
Step-by-step explanation:
We have to find the pair of terms composed of like terms.
(A) 2a, 2b Unlike terms
(B) -3x, +3y Unlike terms
(C) abc, cab
As we know cumulative property of multiplication shows a×(b×c) = (a×b)c
Therefore, both the terms abc and cab are similar.
(D) 4mn, 3my Unlike terms
Option C is the answer.
a vendor has learned that, by pricing pretzels at $1.50 sales will reach 91 pretzels per day. raising the price to $2.25 will cause the sales to fall to 58 pretzels per day. Let y be the number of pretzels the vendor sells at x dollars each. Write a linear equation that models the number of pretzels sold per day when the price is x dollars each
To model the number of pretzels sold per day as a function of the price in dollars using a linear equation, calculate the slope of the line using two known points, and then use the slope and one point to find the y-intercept. The resulting linear equation is y = -44x + 157, where y represents the number of pretzels sold and x represents the price in dollars.
To write a linear equation that models the number of pretzels sold per day when the price is x dollars each, we can start with two given points that represent the sales and price data: (1.50, 91) and (2.25, 58).
Using these points, we can first find the slope of the demand line.
The formula for slope (m) is:
m = (y2 - y1) / (x2 - x1)
Plugging in our values, we get:
m = (58 - 91) / (2.25 - 1.50) = (-33) / (0.75) = -44
The slope of the demand function is -44. This means that for each dollar increase in price, 44 fewer pretzels are sold.
Next, we use the slope-intercept form of a linear equation, which is y = mx + b, where m is the slope and b is the y-intercept. To find the y-intercept, we can use one of the given points. Let's use (1.50, 91).
91 = (-44)(1.50) + b
b = 91 + 66
b = 157
The y-intercept, b, is 157. Knowing both m and b, we can now write the equation of the line:
y = -44x + 157
This equation models the number of pretzels sold, y, at a price of x dollars each.
What is the answer to this question?
Find the component form of v given the magnitudes of u and u + v and the angles that u and u + v make with the positive x-axis. u = 1, θ = 45° u + v = 2 , θ = 90°
At Ron's Roller Rink, the number of customers has been decreasing at a steady rate of 5% per year. If there were 900 skaters per week in 2010, what is a good estimate for the number of skaters per week in 2006?
The scores on a final exam were approximately normally distributed with a mean of 82 and a standard deviation of 11. If 85 students took the exam, and above a 60 is a passing grade, how many students failed the exam?
In this case, we can use the z statistic to find for the proportion of students who failed the exam. The formula for z score is given as:
t = (x – u) / s
where,
x = the sample score = 60
u = sample score mean = 82
s = standard deviation = 11
Substituting all given values into the equation:
t = (60 – 82) / 11
t = - 2
Based from the standard proportion distribution tables for z, this corresponds to:
P = 0.0228
This means that 2.28% of the students failed the exam or equivalent to:
failed students = (0.0228) * 85 = 1.938
approximately 2 students failed the exam
Answer:
2 students failed the exam
Step-by-step explanation:
The difference between the squares of two numbers is 7. four times the square of the first number increased by the square of the second number is 73. find the numbers.
The difference between the squares of two numbers is 7. Four times the square of the first number increased by the square of the second number is 73. By formulating this information into equations, the numbers, thus, obtained are 3 and 4 or -3 and -4.
An equation is a combination of numbers, variables, functions, mathematical operations, etc. in a meaningful way. The equation comprises two or more expressions separated by the equality sign(=), indicating the equivalency.
Let the numbers be x and y, then according to the question,
[tex]x^2 - y^2 = 7[/tex] ...(i)
[tex]4x^2 + y^2 = 73[/tex] ...(ii)
Add both equations,
[tex](x^2 - y^2) + (4x^2 + y^2) = 7 + 73\\(x^2 + 4x^2) + (-y^2 +y^2) = 80\\5x^2 = 80\\x^2 = 16\\x = \pm4[/tex]
Put x = 4 in equation (i),
[tex]4^2 - y^2 = 7\\16 - y^2 = 7\\y^2 = 16-7\\y^2 = 9\\y = \pm3[/tex]
So, the numbers are 3 and 4 or -3 and -4.
Learn more about squares of two numbers, here:
https://brainly.com/question/32597628
#SPJ4
In the diagram AB and AC are tangent to the circle. Find the length of the radius D.C.
Answer:
D. 6 on e2020
Step-by-step explanation:
just took test
When Sharon began shopping this morning, she had $40.00. She purchased five paperback books and had lunch. The books were all the same price, and lunch cost $3.25. She now has $7.00 left over. What was the price of each of the books? A. $5.95 B. $6.60 C. $7.35 D. $8.75
a rectangular floor is 18 feet long and 12 feet wide. what is the area of the floor in square yards
1 yard = 3 feet
18/3 =6
12/3=4
6*4 = 24 square yards
How often is the number of house representatives assigned to states reallocated? every 2 years every 6 years every 10 years never?
The members of the executive branch are the president, vice president and the cabinet. The president holds all the power for this branch of the government and the other members report to the president. The legislative branch writes up and votes on laws. This is called legislation. The legislative branch also known as congress has two parts: the House of Representatives and the senate. Other powers of the congress include declaring war, confirming presidential appointments for groups like the Supreme Court and the cabinet and investigating power. According to Article 1, Section 2, Clause 1, the House of Representatives shall constitute members every 2 years by the people of the state.
A square picture with a side length of 4 inches needs to be enlarged. The final area needs to be 81 square inches.
Which equation can be used to solve for x, the increase in side length of the square in inches?
x2 + 4x – 81 = 0
x2 + 4x – 65 = 0
x2 + 8x – 65 = 0
x2 + 8x – 81 = 0
Answer:
[tex]x^2+8x-65=0[/tex]
Step-by-step explanation:
Side length of square = 4 inches
Let x be the increase in length
So, New length = x+4
Area of square = [tex]Side^2[/tex]
Area of enlarged square = [tex](x+4)^2[/tex]
Using identity : [tex](a+b)^2=a^2+b^2+2ab[/tex]
Area of enlarged square = [tex]x^2+16+8x[/tex]
We are given that The final area needs to be 81 square inches.
So, [tex]x^2+16+8x=81[/tex]
[tex]x^2+16+8x-81=0[/tex]
[tex]x^2+8x-65=0[/tex]
So, Option C is true
Hence equation can be used to solve for x, the increase in side length of the square in inches is [tex]x^2+8x-65=0[/tex]
You invest $9000 with a 6% interest rate compounded semiannually. After 9 yrs, how much money is in your account?
The upper leg length of 20 to 29-year-old males is normally distributed with a mean length of 43.7 cm and a standard deviation of 4.2 cm. a random sample of 9 males who are 20 to 29 years old is obtained. what it the probability that the mean leg length is less than 20 cm? 0.1894 pratically 0 0.2134 0.7898
The probability that the mean leg length is less than 20 cm is practically 0.
Explanation:To find the probability that the mean leg length is less than 20 cm, we can use the sampling distribution of the sample mean. The sampling distribution of the sample mean is approximately normal when the sample size is large enough. In this case, the sample size is 9, which is smaller than 30 but still reasonably large, so we can assume that the sampling distribution of the sample mean follows a normal distribution.
We can standardize the sample mean using the formula:
z = (x - μ) / (σ / sqrt(n))
Where:
z: the z-scorex: the value of the sample meanμ: the population meanσ: the population standard deviationn: the sample sizeSubstituting the given values:
z = (20 - 43.7) / (4.2 / sqrt(9))
z = -23.7 / (4.2 / 3)
z = -23.7 / 1.4
z ≈ -16.93
Looking up the z-score in a standard normal distribution table, we find that the probability of getting a z-score less than -16.93 is practically 0. Therefore, the probability that the mean leg length is less than 20 cm is practically 0.
A new crew of painters can paint a small apartment in 12 hours. AN EXPERIENCED crew can paint the small apartment in 6 hours. How many hours does it take to paont the apartment when the two crews work together?
Poisson suppose you have 5 cakes made ready to sell. what is the probability that you will sell out?
Calculate M6 for f(x)=4⋅ln(x^2) over [1,2].
To calculate M6 for f(x)=4⋅ln(x^2) over [1,2], differentiate the function to find f'(x). Integrate f'(x) over the given interval to find the area under the curve. Subtract the value of the integral at the lower limit from the value at the upper limit to get M6.
Explanation:To calculate M6 for the function f(x) = 4⋅ln(x^2) over the interval [1,2], follow these steps:
Differentiate the function to find f'(x).Integrate f'(x) over the given interval to find the area under the curve.Subtract the value of the integral at the lower limit from the value at the upper limit to get M6.In this case, since f(x) = 4⋅ln(x^2), we have f'(x) = 8/x. Integrate f'(x) from 1 to 2 to get M6.
Learn more about Calculating definite integrals here:https://brainly.com/question/10680842
#SPJ11
Melissa is making clothes for her dolls. She has 78 yard of fabric. Each style shirt requires 2/7 of a yard of fabric. How many shirts can she make for her dolls?
How do you solve this