Answer:
r = 5 inches
Step-by-step explanation:
Area of circle, 
It is required to find the radius of the circle. The area of a circle is given by the formula :

r is radius of the circle

So, the radius of the circle is 5 inches.
Answer:
mean = sum of the terms/total no. of terms
mean = (16+12+13+22)/4
mean = 63/4 or 15.75
Answer:
the first and the second answer
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
7^-2 = 1/7^2
The negative means you flip it
1/7^2 times 7^6 is 7^6/7^2 (just multiply).
using rules of exponents, 7^6/7^2 is 7^4 (just subtract 2 from 6)
D is the only one that equals 7^4, as 2 times 2 is 4.
I think you have to combine like terms to solve this one. (6d - 3d) + (5 - 2) = 3d + 3