An elevator descends into a mine shaft at the rate of 6 m/min. If the descendstarts from 20 meter above the ground level, how long will it take to reach - 340m?

Answers

Answer 1

it has to travel 20 meters before it gets to ground level, then another 340 meters till it reaches -340.....so it has to travel a total of 360 meters

and if it descends at a rate of 6 meters per minute...
360/6 = 60 minutes....or 1 hr to reach -340 <==

Related Questions

solve for b, then find the value of b when a = 3.
4a=2b-7

a. -9/2
b. 5/2
c. 19/2
d. 17

Answers

4a=2b-7
4(3) = 2b - 7
12 = 2b - 7
2b = 12 + 7
2b = 19
b = 19/2

answer
c. 19/2

Your answer will be 19/2

A stick 42 inches long is broken into two pieces, so that one piece is twice as long as the other one. How long are the two pieces ?

Answers

Total length of stick = 42 inches.

Let the shorter piece be x inches.

Thus, the longer piece is 2x.

2x + x = 42

3x = 42

x = 14

Therefore, the length of the two pieces are 14 inches and 28 inches.

The answer is 14 inches and 28 inches:

Total length of stick = 42 inches.

Let the shorter piece be x inches.

Thus, the longer piece is 2x.

2x + x = 42

3x = 42

x = 14

Therefore, the length of the two pieces are 14 inches and 28 inches.

-x+3+5(2x-6)+9(3x+11) will you answer with work shown and answer

Answers

Hello there!

[tex]#-x + 3 + 5(2x - 6) + 9(3x + 11)# #-x + 3 + 10x - 30 + 27x + 99# Put the common terms together #-x + 10x + 27x + 3 + 99# #36x + 72#[/tex]

Find the product of 543.1187 and 100

Answers

That would be 54311.87

A restaurant offers a choice of 2 soups, 3 entrees, and 5 desserts. how many different meals consisting of a soup, an entree, and a dessert are possible?

Answers

multiply all of the numbers

What is the 7th term of the geometric sequence where a1 = -5 and a5 = -1,280?

Answers

Any geometric sequence can be expressed as:

a(n)=ar^(n-1), a=initial term, r=common ratio, n=term number.

Here we are give the initial term so we have to solve to solve for the common ratio...

a(5)=-1280 and a(1)=-5 so

-1280=-5r^(5-1)

-1280=-5r^4

256=r^4

256^(1/4)=r

4=r, so our sequence is:

a(n)=-5(4^(n-1)), so the 7th term is:

a(7)=-5(4^6)

a(7)= -20480

the price of 9-volt batteries is increasing according to the function below, where t is years after January 1, 1980. During what year will the price reach $4? use formula P(t)=1.1*e^0.047t A.)2007 B.)2005 C.)2003 D.)2009

Answers

4=1.1e^(0.047t) divide both sides by 1.1

40/11=e^(0.047t) take the natural log of both sides

ln(40/11)=0.047t divide both sides by 0.047

t=ln(40/11)/0.047

t≈24.5

1980+24.5

2007.5

So during 2007 the price will reach $4.

Answer:

The option A.) 2007 is correct

Step-by-step explanation:

The formula which is to be used is given :

[tex]P(t) = 1.1\cdot e^{0.047t}[/tex]

where P(t) is the function of time t and t is the time in years after January 1 , 1980

Now, we need to find the year when the price will reach $4

So, substituting P(t) = 4 and finding the value of t from the given equation.

[tex]\implies 4=1.1\cdot e^{0.047t}\\\\\implies 3.64=e^{0.047t}\\\\\text{Taking natural log ln on both the sides}\\\\\implies \ln 3.64=\ln e^{0.047t}\\\\\implies 1.29=0.047\cdot t\\\\\implies t = 27.49[/tex]

So, t = 27.49 which is approximately equals to 27.5 years

So, 27.5 years after January 1, 1980 is the year 2007

Hence, The price will reach $4 in the year 2007

Therefore, The option A.) 2007 is correct

Alexis put $2000 in a savings account. After 4 years, she had $2543 in the account. What rate of interest did she earn? Use the formula A= Pe^rt, where A is the ending amount, P is the principal (initial amount), r is the interest rate, and t is time.

Answers

This is substitution, it's very simple once you get the hang of it!

okay, what you want to do is plug in the numbers you already have, to get the number you don't have(r).

First, you plug in the numbers.

1. P= $2000
A=$2543
t= 4(years)
r=?

2543=2000^r(4)

Secondly, you want to solve the equation.

Answer:

Rate of interest = 6%

Step-by-step explanation:

Alexis put $2000 in a savings account. After 4 years, she had $2543 in the account.

Use the formula,

[tex]A=Pe^{rt}[/tex]

[tex]P\rightarrow \$2000[/tex]

[tex]r\rightarrow ?[/tex]

[tex]A\rightarrow \$2543[/tex]

[tex]t\rightarrow 4\text{ years}[/tex]

Substitute the value into formula and solve r

[tex]2543=2000e^{4r}[/tex]

[tex]e^{4r}=1.2715[/tex]

Apply ln both sides

[tex]4r\ln(e)=\ln(1.2715)[/tex]

[tex]r=0.06[/tex]

Rate of interest = 6%

Hence, The rate of interest is 6%

Braces are used in interval or roster notation?

Answers

Braces, also called curly brackets in used to list the elements of a set in a roster notation.

While parenthesis is used in interval notation.

How to convert decimal to binary by hand?

Answers

You have to divide decimal number by 2 and then to write the reminder. Then you have to continue to divide the result by 2 and so on. At the end you have to read all those reminders ( numbers 0 and 1 ) backwards and you will get the binary number. Example: Convert 10 ( decimal ) to binary.
10 : 2 = 5 |   0
5 : 2 = 2 |   1
2 : 2 = 1 |   0
1 : 2 = 0 |   1
                        ↑
Finally: 10 ( decimal ) = 1010 ( binary )

What is the slope of the line on the graph below?

A. -1/2
B. 1/2
C. 1
D. 2

Answers

Answer: choice D) the slope is 2

---------------------------------------------------------------------
---------------------------------------------------------------------

Work Shown:

Pick any two points on the line. I'm going to pick (0,1) and (1,3)

Label these two points as (x1,y1) and (x2,y2).
So,
(x1,y1) = (0,1) meaning that x1 = 0 and y1 = 1
(x2,y2) = (1,3) meaning that x2 = 1 and y2 = 3

Now use the slope formula
m = (y2 - y1)/(x2 - x1)
m = (3-1)/(1-0)
m = 2/1
m = 2

Going from (0,1) to (1,3) we move 2 units up and 1 unit to the right.
The "2 units up" is the "rise"
The "1 unit to the right" is the "run"

Slope = rise/run = (change in y)/(change in x)

Answer:

d on edge

Step-by-step explanation:

Given the equation 2x + 4 = 4x − 2, select the reasoning that correctly solves for x.

Add 2, subtract 2x, then divide by 2.
Add 2, subtract 4x, then divide by −2.
Subtract 4, subtract 2x, then divide by −2.
Subtract 4, subtract 4x, then divide by 2.

Answers

Answer:

Number One / Letter A

Step-by-step explanation:

Add 2, subtract 2x, then divide by 2.

Hope This Helps!

Aiden calculated the area of triangle QRS below by finding half the product of 1.5 and 1.1.

Answers

His error is the second choice.
Aiden should have calculated
area = (1.1 * 5.4) / 2
because triangle area = half the base times the altitude.

Answer: The correct option is

(B) Aiden should have found half the product of 1.1 and 5.4 because the 1.5 line is not perpendicular to 1.1 line.

Step-by-step explanation: Given that Aiden calculated the area of triangle QRS by finding half the product of 1.5 and 1.1.

We are to select the correct option which states the error made by Aiden.

The AREA of a triangle is given by

[tex]A=\dfrac{1}{2}\times \textup{base}\times \textup{altitude},[/tex]

where the altitude is perpendicular to the base.

In ΔQRS, the length of the base is given by

b = QS = 0.9 + 4.5 = 5.4 units

and

the length of the altitude is given by

h = 1.1 units.

So, the area of the triangle QRS will be

[tex]A=\dfrac{1}{2}\times b\times h=\dfrac{1}{2}\times 5.4\times 1.1[/tex]

Therefore, the area of ΔQRS will be calculated by finding half the product of 1.1 and 5.4.

So, Aiden made the error by finding half the product of 1.5 and 1.1, because 1.5 line is not perpendicular to 1.1 line.

Thus, Aiden should have found half the product of 1.1 and 5.4 because the 1.5 line is not perpendicular to 1.1 line.

Option (B) is correct.

Am I doing this right?

Answers

For which one, and are you just finding the volume

Joshua is 25 years old and has a high risk job making $72,000 a year. The insurance company charges him an extra 20% on top of his premium rate because of his job. If Joshua wants a policy that will replace five years of his salary, what is the annual premium for the cheapest policy?

Answers

I believe is $6,644...

Simplify the expression 3^5*6^-6/3^3*6^-4

A. 180
B. 5/2
C. 1/4
D. 3/20

Answers

3^5*6^-6/3^3*6^-4
= 3^(5-3) 6^(-6+4)
=3^2 6^-2
= 9/36
= 1/4

answer

C. 1/4

Write an equation for each translation of y=lxl

7 units up

Answers

[tex]\bf \qquad \qquad \qquad \qquad \textit{function transformations} \\ \quad \\\\ % left side templates \begin{array}{llll} f(x)=&{{ A}}({{ B}}x+{{ C}})+{{ D}} \\ \quad \\ y=&{{ A}}({{ B}}x+{{ C}})+{{ D}} \\ \quad \\ f(x)=&{{ A}}\sqrt{{{ B}}x+{{ C}}}+{{ D}} \\ \quad \\ f(x)=&{{ A}}(\mathbb{R})^{{{ B}}x+{{ C}}}+{{ D}} \\ \quad \\ f(x)=&{{ A}} sin\left({{ B }}x+{{ C}} \right)+{{ D}} \end{array}\\\\ --------------------\\\\[/tex]

[tex]\bf % template detailing \bullet \textit{ stretches or shrinks horizontally by } {{ A}}\cdot {{ B}}\\\\ \bullet \textit{ flips it upside-down if }{{ A}}\textit{ is negative}\\ \left. \qquad \right. \textit{reflection over the x-axis} \\\\ \bullet \textit{ flips it sideways if }{{ B}}\textit{ is negative}\\ \left. \qquad \right. \textit{reflection over the y-axis}[/tex]

[tex]\bf \bullet \textit{ horizontal shift by }\frac{{{ C}}}{{{ B}}}\\ \left. \qquad \right. if\ \frac{{{ C}}}{{{ B}}}\textit{ is negative, to the right}\\\\ \left. \qquad \right. if\ \frac{{{ C}}}{{{ B}}}\textit{ is positive, to the left}\\\\ \bullet \textit{ vertical shift by }{{ D}}\\ \left. \qquad \right. if\ {{ D}}\textit{ is negative, downwards}\\\\ \left. \qquad \right. if\ {{ D}}\textit{ is positive, upwards}\\\\ \bullet \textit{ period of }\frac{2\pi }{{{ B}}}[/tex]

with that template in mind.. .let's see

[tex]\bf y=|x|\implies \begin{array}{lllcll} y=&1|&1x&+0|+&0\\ &\uparrow&\uparrow &\uparrow &\uparrow \\ &A&B&C&D \end{array}[/tex]

7 units up, meaning D = 7

One ordered pair $(a,b)$ satisfies the two equations $ab^4 = 12$ and $a^5 b^5 = 7776$. what is the value of $a$ in this ordered pair?

Answers

Final answer:

To find the value of a in the ordered pair (a,b), we can solve the given equations. Substituting ab^4 with 12 in the second equation, we get a^5 (12)^5 = 7776. Solving for a gives a = 0.03125^(1/5) = 0.5.

Explanation:

To find the value of a in the ordered pair (a,b), we can solve the given equations.

From the first equation, ab^4 = 12, we can substitute ab^4 with 12 in the second equation:
a^5 b^5 = 7776

This gives us:
a^5 (12)^5 = 7776
12^5 = 12 * 12 * 12 * 12 * 12 = 248,832

Dividing both sides of the equation by (12^5) gives:
a^5 = 7776 / (12^5) = 7776 / 248,832 = 0.03125

Taking the fifth root of both sides gives:
a = 0.03125^(1/5) = 0.5

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The sum of two consecutive integers is 111. find the largest of these integers

Answers

divide 111 in half

111/2 = 55.5

take the whole number above and below 55.5

so you get 55 and 56

55 + 56 = 111

56 is the larger one

Benny bought 5 new trading cards to add to his collection. The next day his dog ate half of his collection. There are now only 43 cards left. How many cards did Benny start with?

Answers

81 cards 43x2=86 86-5=81

Simplify 5(6x - (6 - 7y + 7x) + 6y)

-80x + 87y - 91
-5x + 65y - 30
-82x + 73y - 54
-60x + 9y - 17
None of the above

Answers

5(6x - (6 - 7y + 7x) + 6y)

= 5(6x - 6 + 7y - 7x + 6y)

= 5(-x + 13y -6)

= -5x +65y -30

Hence, the answer is B.

Given the point (5, 6) and the slope of 5, find y when x = 21.

Answers

y=mx+b

6=5(5)+b
6=25+b
-19=b

y=5x-19

y=5(21)-19
y=105-19
y=86

Final answer: y=86

Solve each proportion. Show your work

Answers

a)
2x/7 = 12/14
x=6

I don't know b i am sorry

(2x)/7 = 12/14
cross multiply
(2x)(14) = (7)(12)
28x = 84
x = 84/28
x = 3

3 / (x - 1) = 5/7
cross multiply
5(x-1) = (7)(3)
5x - 5 = 21
5x = 21 + 5
5x = 26
x = 26/5 or 5.2

Slope (12,-18),(11,12)

Answers

If you are trying to find the slope using only these two points then you should first take note of what your X and Y values are. For instance, 12 & 11 are your X values and -18 & 12 are your Y values. Knowing this you can now find your slope by doing y2-y1/
x2-x1. You will get the fraction -30/1 or -30 which is your slope. Hope that made sense!

Final answer:

The slope of the line passing through the points (12, -18) and (11, 12) is calculated using the formula for slope (y2 - y1) / (x2 - x1). The result is -30.

Explanation:

The subject of this question is Mathematics, more specifically the topic of 'Slope of a Line'. The grade level appears to be High School.

To answer the question 'Find the slope for the given coordinates (12,-18) and (11,12)', we use the formula to calculate the slope between two points which is (y2 - y1) / (x2 - x1). Let's take (12, -18) as (x1, y1) and (11, 12) as (x2, y2). Now we just input the values into the formula:

Slope (m) = (12 - (-18)) / (11 - 12).

This simplifies to Slope (m) = 30 / -1 = -30.

So, the slope of the line passing through the points (12, -18) and (11, 12) is -30.

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Can someone help me with this one real quick ? Thanks a lot! Please explain and show your work :)

Answers

a. Given.
You were given the proof.

b. Corresponding angles are congruent.
Since angles 1 and 2 are corresponding, then if one is 130, then the other one is also 130.

c. Vertical angles are congruent.
Angles 2 and 3 are vertical, meaning they'll also be congruent.

d. Transitive Property of Equality.
If angles 2 and 3 are vertical, then if 2 is 130, then 3 is also 130.

What would a monthly payment be on a purchase of a $10,000 car at a 5.9% for 4 years?

Answers

The current monthly pay can be calculated as follows;
A=p(1/r/100)^n
A=10000
r=5.9/12=0.5%
10000=p(1+0.5/100)^(4*12)
10000=p(1.005)^48
p=10000/(1.005)^48
p=7,871
the monthly payment will be:
7871/12
=$655.92

Answer:

$234.39

Step-by-step explanation:

What can you say about the function that generated the following table of values

Answers

best answer is b = it has exactly 1 x intercept

Answer:

Step-by-step explanation:

We know that for x-intercept the graph crosses x-axis i.e the value of y = 0.

As in the table, the value of y is changing from negative to positive, so it will obtain the value y = 0 for some vale of x.

Therefore, this function will have only one x-intercept.

Hence, option A, C, D are discarded and option B is correct.

Find the equation of the perpendicular line passing through the midpoint of the line segment connecting (−1, 7) and (2, 3). incorrect: your answer is incorrect.

Answers

eh this is probably correct ?

Which of the relations given by the following sets of ordered pairs is a function?
Select one:
a. {
(2,4),(2,6),(2,8),(2,10),(2,12)
(2,4),(2,6),(2,8),(2,10),(2,12)
}
b. {
(−5,−4),(−4,−3),(−3,−2),(−4,−5),(−2,−1)
(−5,−4),(−4,−3),(−3,−2),(−4,−5),(−2,−1)
}
c. {
(0,3),(−6,8),(−3,5),(0,−3),(7,11)
(0,3),(−6,8),(−3,5),(0,−3),(7,11)
}
d. {
(8,1),(−4,1),(3,5),(0,4),(−1,2)
(8,1),(−4,1),(3,5),(0,4),(−1,2)
}

Answers

A function will not have any repeating x values...it can have repeating y values, just not the x ones. SO look at all the x values in ur answer choices...which answer choice has all x values different ?

ur answer would be D....because ur x values (8,-4,3,0,-1) are all different

Since no two different ordered pairs have the same x -coordinate, relations D given by the following sets of ordered pairs is a function.

What is a function?

It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.

The relation might be put up as a table of ordered pairs. The next step is to determine if each element in the domain matches precisely one element in the range.

A function is a collection of ordered pairs where no two ordered pairs are the same in terms of x-coordinate. A function is defined by an equation that yields such a collection of paired objects.

The relations given by the following sets of ordered pairs is a function is,

d. {(8,1),(−4,1),(3,5),(0,4),(−1,2)(8,1),(−4,1),(3,5),(0,4),(−1,2)}

Thus, no two different ordered pairs have the same x -coordinate, relations D given by the following sets of ordered pairs is a function.

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Evaluate the limit lim h → 0 (−5 + h)2 − 25 h

Answers

Easily substitute with h=0 is the limit function:

(-5 + 0)^2 -25(0) = 25 -0 = 25

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