Hello!
To solve this you need to use the equation to find the area of a circle which is

A is area
r is radius
Solve both circles
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Circle 1

Square the number

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Circle 2
A =

Square the number

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Finding the answer
To get the answer you subtract the numbers

The difference is

which is about 62.83 units
Hope this helps!
The answer is B and I am certain
Because 2x5 is 10 and 2xr is 2r
So it’s 10+2r
The amount of time required to travel a certain distance is equal to quotient of distance and speed. We let x be the speed of Terry and Mark's will be x+2. The equation that would best represent the scenario is,
15/x = 21/(x+2)
The value of x is 5. Thus, Mark's speed is 7 mph.
Answer:
The area is 12x^2
Step-by-step explanation: