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Nikitich [7]
3 years ago
12

Find the area of the circle ! Please help

Mathematics
1 answer:
Oduvanchick [21]3 years ago
6 0

Answer:

D

Step-by-step explanation:

Area of a circle is pi(radius^2)

the diameter of the given circle is 18km

the radius is half so it’s 9km

A = pi(9^2)

A = 81pi km2

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A car travels 240 miles in 4 hours. at this rate, how many miles will it travel in 8 hours
oksian1 [2.3K]
First you need to find the rate. This problem is based on the formula d = rt
d = distance
r = rate 
t = time.

The question is asking how many miles will it travel in 8 hours so to find this out we need to find the rate when the car travels 240 miles in 4 hours. We use this information and plug it into the model d = rt

d = 240
r = don't know yet
t = 4 hr
d = rt 
240 = 4r
240 / 4 = 4r / 4
60 = r
r = 60
So the car is going at a rate of 60 miles per hour. Now that we know this we can solve for how many miles the car will travel in 8 hours.
d = rt
d = r * t
d = 60 * 8
d = 480

So the car will travel 480 miles in 8 hours

Another way to think about this is that you know the car traveled 240 miles in 4 hours and the question is wanting to know how far the car will travel in 8 hours, which would be double the 4 hours so 240 + 240 = 480

8 0
4 years ago
Solve for x.<br> 2x/x+12=1/2
ANTONII [103]

Answer:

No solution exists for 2x/x+12=1/2

Step-by-step explanation:


6 0
3 years ago
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The scatter plot and regression line below show the relationship between how early students turned in an exam (measured by minut
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Step-by-step explanation:

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A parallelogram with a base of x units and a height of y units is changed
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Answer:

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The second choice gives us \csc C= \frac{1}{ \sin C}= \frac{1}{\frac {5}{8}}&#10;\\ = 1 \div \frac{5}{8} = \frac{1}{1} \div \frac{5}{8}&#10;\\ = \frac{1}{1} * \frac{8}{5} = \frac{8}{5}.  The second choice is not correct either.
The third choice gives us 
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3 years ago
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