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3 years ago

15

Guys I need this ASAP I NEED the exact answer in terms of n/pi. I also need to use n/pi=22/7 and express the answer as a fractio

n in lowest terms. And I need to use the n/pie button on my calculator and express the answer to the nearest hundredth but I don’t know how to do this so PLEASE LOOK AT THE PIC and ANSWER ALL 3 parts of this so I can get full credit please I am begging you I need this ASAP!!

1 answer:

TiliK225 [7]3 years ago

3 0

Answer:

a. $C=28\pi \ cm$

b. $C=\frac{88}{1}\ cm$

c. $C=87.96 \ cm$

Step-by-step explanation:

The formula to find the circumference of a circle is:

$C=2\pi r$

Where "r" is the radius of the circle.

In this case you can identify that:

$r=14\ cm$

Then:

a. Substituting the radius of the circle into the formula, you get:

$C=2\pi (14\ cm)\\\\C=28\pi \ cm$

b. Substitute the radius into the formula (Remeber to use $\pi=\frac{22}{7}$ ) and then evaluate. So you get:

$C=2(\frac{22}{7})(14\ cm)\\\\C=\frac{616}{7}\ cm\\\\C=\frac{88}{1}\ cm$

c. Substitute the radius into the formula but this time you must use the π button in the calculator:

$C=2\pi (14\ cm)\\\\C=87.964 \ cm$

Rounded to the nearest hundreth, this is:

$C=87.96 \ cm$

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3 years ago

Ann is adding water to a swimming pool at a constant rate. The table below shows the amount of water in the pool after different

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Step-by-step explanation:

From inspection of the table, we can see that <u>as time increases, the amount of water in the pool increases</u>.

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Therefore, the rate at which the water in the pool is increasing is:

<u>11 gallons per minute</u>

To find the amount of water that was already in the pool when Ann started adding water, we need to create a linear equation using the found slope and one of the ordered pairs with the point-slope formula:

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2 years ago

Read 2 more answers

How to find the equation?

bixtya [17]

Answer:

y = 2x + 60

Step-by-step explanation:

Use the equation for a line: y = mx + b

Where

x and y are points on the graph

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so the slope is 10/5 or 2, since the graph goes up by 10 and over by 5.

so plug into the equation, and you get y = 2x + b

Next, pick a point on the graph, and plug in the x and y coordinates,

for example:

(x,y) = (5,70)

so, 70 = 2(5) + b

then solve for b

60 = b

Then rewrite the equation

y = 2x + 60

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