A screwdriver is dropped from the top of an elevator shaft. Exactly 6.0 seconds later, the sound of the screwdriver hitting bottom is heard. How deep is the shaft? Hint: The distance that a dropped object falls in t seconds is represented by the formula s = 16t2. The speed of sound is 1100 ft/sec. The shaft is approximately (Round to the nearest tenth.) | feet deep.

Answers

Answer 1

Answer:

Step-by-step explanation:

Using the equation of motion

S = ut+1/2gt²

S is the height of fall

g is the acceleration due to gravity = 9.81m/s²

u is the initial velocity = 0m/s

t is the time = 6s

Substitute in the formula;

S = 0+1/2(9.81)×6²

S = 4.905×36

S = 176.58m

The shaft is 176.58m deep

Given the expression for distance

S = 16t²

Velocity V = dS/dt

V = 32t

Given v = 1100

1100 = 32t

t = 1100/32

t = 34.375secs

Substitute t = 34.375 into S = 16t²

S = 16(34.375)²

S = 18,906.25ft


Related Questions

Which one is it and how? Please help

Answers

Answer:

-[tex]10^{13}[/tex]

Step-by-step explanation:

Numbers with the same base multiplying with each other will have their expoenent add up.

In this case, both number has a base of -10, so we're allow to group them and add up their exponents.

[tex](-10)^8(-10)^5=(-10)^{8+5}=(-10)^{13}[/tex]

Maria made 4 pies for the school carnival. She cut each pie into 8 slices. If she sold 27 slices, how many slices did she have leftover?

Answers

Answer:

She had 5 slices left over

Step-by-step explanation:

8 times 4 is 32 so then subtract 27 and you get 5

You add 4 drops of food coloring to 2 cups of white frosting and get the orange frosting above. Francisco wants his frosting to be the same color as yours, but he has 5 cups of white frosting. He doesn't know how many drops of orange food coloring to add.

Answers

Answer:

Francisco will add 10 drops of food coloring to 5 cups of white frosting and get the orange frosting

Step-by-step explanation:

4 drops of food coloring to 2 cups of white frosting and get the orange frosting.

He has 5 cups of white frosting. He doesn't know how many drops of orange food coloring to add

Let x = drops of food coloring he will add

Drops of food coloring : cups of white frosting

4 : 2 = x : 5

4 / 2 = x / 5

Cross multiplication

4 * 5 = 2 * x

20 = 2x

Divide both sides by 2

x = 20 / 2

= 10

x = 10 drops of food coloring

Therefore, Francisco will add 10 drops of food coloring to 5 cups of white frosting and get the orange frosting

Help please I’ll mark u brainlest

Answers

Answer: i can't see the question.

Step-by-step explanation:

2p + 4q =20 translate into a sentence

Answers

Answer:

two "P" plus four "Q" equals twenty

Step-by-step explanation:

I changed the numbers to words

I need help answering this question I dont get it at all. please someone help​

Answers

1)angle 2 and 3

2) angle 8

3)angle 6

What is 7 3/8 + 2 1/8

Answers

Answer:

9.5

Step-by-step explanation:

9 1/2 or 9 4/8
Because both numbers have the same denominator so there is no need for extra work so:
7 + 2 = 9
3/8 + 1/8 = 4/8 or 1/2
9 + 4/8 = 9 4/8 or 9 1/2

what is the slope or yhe line yoing through (-2,-1) (1,2)

Answers

Answer:

Slope: 1

Step-by-step explanation:

You can find the slope by doing change in y/change in x.

Change in y is 3

Change in x is 3

So 3/3 is 1, and the slope is 1

f(x) = x2+9 g(x) = X-9 Find f(x)-g(x).​

Answers

Answer:

Hi there

Your answer is

x^2 -x +18

Step-by-step explanation:

( x^2 + 9 ) - (x-9)

x^2 + 9 -x +9

x^2 -x +18

What is the value of n in the equation in = 9?
n =

Answers

Answer:

n=0

Step-by-step explanation:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

It is n=0 I just know it

Solve the equation using Inverse operatlons.
2 + x^3=18

Answers

16/3 or 5 1/3. The answer

quick and simpler please im practicing this for class​

Answers

Answer:

a=9/100   b= 7/20

Step-by-step explanation:

For a all you do is take the 9 out of the 100 in 1.

For b, all you do is take the 35/100, and then simplify it, so in this case it is 7/10 if you divide both the numerator and denominator by 5.

So a = 9/100 and b = 7/20

I need help asap thanks

Answers

Answer:

B. y=5/4 x-4

Step-by-step explanation:

Slope of line= [tex]\frac{y2-y1}{x2-x1}[/tex]

= [tex]\frac{1-(-4)}{4-0}[/tex]

=5/4

HELP WILL MARK YOU BRAINLIEST HURRY IM ON A TIME LIMIT!’

Answers

(3x+5)+(x+3)=180

4x+8=180

4x=172

x=43

3(43)+5

<PQR=134

<SQR=46

Answer:

[tex]\boxed {\angle PQR = 134\textdegree}[/tex]

Step-by-step explanation:

Both angles are Supplementary (Two angles that add up to 180°). So, write an expression using the following measurements of both [tex]\angle PQR[/tex] and [tex]\angle RQS[/tex] and 180:

[tex]\angle PQR = 3x + 5[/tex]

[tex]\angle RQS = x + 3[/tex]

[tex]3x + 5 + x + 3 = 180[/tex]

Solve:

[tex]3x + 5 + x + 3 = 180[/tex]

[tex]4x + 5 + 3 = 180[/tex]

[tex]4x + 8 = 180[/tex]

[tex]4x + 8 - 8 = 180 - 8[/tex]

[tex]4x = 172[/tex]

[tex]\frac{4x}{4} = \frac{172}{4}[/tex]

[tex]x = 43[/tex]

-After you have the value of [tex]x[/tex], use it to the expression of [tex]\angle {PQR}[/tex] to get the actual answer of [tex]\angle PQR[/tex]:

-The value of [tex]x[/tex]:

[tex]x = 43[/tex]

-Solve for the measurement of [tex]\angle PQR[/tex]:

[tex]3x + 5[/tex]

[tex]3(43) + 5[/tex]

[tex]129 + 5[/tex]

[tex]134[/tex]

-The measurement of [tex]\angle PQR:[/tex]

[tex]\boxed {\angle PQR = 134\textdegree}[/tex]

4.5 times what equals 5

Answers

Answer:

REEEEEEEEEEEEEEEEEEEEE

Step-by-step explanation:

i thnk that the answer is .9333 !!

The 4.5 times 10/9 equals 5. In other words, if you multiply 4.5 by 10/9, you get the value of 5.

To find the number that, when multiplied by 4.5, equals 5, we can set up an equation and solve for the unknown number.

Let's represent the unknown number as 'x':

4.5 * x = 5

To isolate 'x', we need to get rid of the coefficient 4.5. To do that, we'll divide both sides of the equation by 4.5:

x = 5 / 4.5

Now, perform the division:

x = 1.111...

The result is a repeating decimal, which means the number that satisfies the equation is 1.111... (with 1 repeating indefinitely).

To express the result more precisely, we can write it as a fraction:

x = 5 / 4.5 = 10 / 9

Therefore, 4.5 times 10/9 equals 5. In other words, if you multiply 4.5 by 10/9, you get the value of 5.

To know more about multiply:

https://brainly.com/question/30875464


#SPJ6

what is the property of 7/9 * 1 = 7/9

Answers

Answer:

identity property of multiplication (multiplying a number by one will result in that number)

Step-by-step explanation:

Write an equation in slope-intercept form for the line that has a slope of -1/3 and passes through (-6,1)

Answers

Answer:

Step-by-step explanation:

Solve the system of linear equations. 4x + 6y = 12 x + 2y = 10 The solution is​

Answers

Answer:

x = -18, y = 14

Step-by-step explanation:

4x + 6y = 12

x + 2y = 10

Divide both sides of the first equation by 2. Write the second equation below it.

2x + 3y = 6

x + 2y = 10

Rewrite the first equation. Multiply both sides of the second equation by -2 and write below it. Then add the equations eliminating x.

      2x + 3y = 6

(+)  -2x - 4y = -20

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

             -y = -14

y = 14

Substitute 14 for y in the second equation and solve for x.

x + 2y = 10

x + 2(14) = 10

x + 28 = 10

x = -18

Solution: x = -18, y = 14

can anyone plz help with this​

Answers

No because each section isn’t equal in size
no because each section is a different size

The ratio 5:1/7 has a unit rate of 35 true or false

Answers

Answer:

True

Step-by-step explanation:

To find the unit rate, what we do is to divide the preceding value in the ratio by the succeeding value in the ratio.

Thus, we have;

5 divided by 1/7

= 5 * 7/1

= 35

This is the unit rate of the given ratio

Ariana is going to invest in an account paying an interest rate of 1.9% compounded monthly. How much would Ariana need to invest, to the nearest ten dollars, for the value of the account to reach $110,000 in 14 years?

Answers

Answer:

110000=p(1+0.019)^168

23.62p=110000

p=4660

credit: sqdancefan

Answer:

84330

Step-by-step explanation:

The compound interest formula gives the value of an investment.

 A = P(1 +r/n)^(nt)

where principal P is invested at annual rate r compounded n times per year for t years. Using your given values, we can solve for P.

 110,000 = P(1 +0.019/12)^(12·14)

 P = 110,000/(1 +0.019/12)^(12·14) ≈ 110,000/1.00158333...^168

 P ≈ 110,000/1.30446

 P ≈ 84326.04 ≈ 84,330 . . . . dollars

20 points will be given

Answers

Answer:

a

Step-by-step explanation:

There is a tiny box on the intersecting parts of the line which means it is going to be 90 degrees.

is 2yx – 3y + 2x = 0 a linear function or not a linear function

Answers

is a linear function because It forms a straight line or represents the equation for the straight line

It has only one degree. Or we can also define it as an equation having the maximum degree 1.  

All these equations form a straight line in XY plane. These lines can be extended to any direction but in a straight form.

The general representation of linear equation is;

y = mx +c

Where x and y are the variables, m is the slope of the line and c is a constant value.

Given triangle JKL, sin(38°) equals

cos(38°)
cos(52°)
tan(38°)
tan(52°)

Answers

Answer:

B I TOOK THE TEST

Step-by-step explanation:

Answer:

The Answer is

Cos(52)

Step-by-step explanation:

in case the letters aren't the same

Foster is centering a photo that is 1 1/2 inches wide on a scrapbook page that is 16 inches wide. How far from each side of the page should he put the picture? Enter your answer as a mixed number.

Answers

1 1/2:16 and solve {pic provided)

A kilogram of potatoes cost $25.A dozen bananas cost $40.

a) Write an algebraic expression for the total cost of n kilograms of potatoes and one dozen bananas.

b) Evaluate your expression to determine the cost of 15kg of potatoes and one dozen bananas​

Answers

Answer:

a) T = 25n + 40

b) T = $415

Step-by-step explanation:

The total cost of 'n' kilograms of something can be expressed as 'n' multiplied by the cost, since it is a constant cost per unit. Therefore the price for n kg of potatoes can be expressed as 25n. We are also told that a dozen bananas cost $40, so our expression is the cost of potatoes added to the cost of bananas. So, is we use 'T' for total cost, our expression will look like this:

T = 25n + 40

Now we can use this expression to find the cost of 15kg of potatoes and the same amount of bananas. We can do this by simply substituting the given amount for n:

T = 25(15) + 40

T = 375 + 40

T = $415

The cost of 15kg of potatoes and one dozen bananas is $415.

Hope this helped!

Find the four consecutive odd integers whose sum is -324

Answers

Answer:

x ,x+2, x+4, x+6 it mst b it

Please help :(

Find the value of X in the triangle shown below.​

Answers

Answer:

x = 33°

Step-by-step explanation:

All angles in a triangle add up to 180°.

Step 1: Set up equation

x + 114 + 33 = 180

Step 2: Solve for x

Combine like terms: x + 147 = 180Subtract 147 on both sides: x = 33

If DM = 45, what is the value of r?
r +3
4r - 28

A 12
B 13
C. 14
D. 15

Answers

Answer:

-7 i hope this right

Step-by-step explanation:

Find the Greatest Common Factor (GCF).

GCF = 44

2 Factor out the GCF. (Write the GCF first. Then, in parentheses, divide each term by the GCF.)

4(\frac{4r}{4}-\frac{28}{4})4(

​4

​4r

​​ −

​4

​28

​​ )

3 Simplify each term in parentheses.

4(r-7)4(r−7)

Answer: 14

Step-by-step explanation:

Got it right in a test ‍

2. What are the angle measures of the triangle?

Answers

The answer is the Top one
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