Answer:
The radius is 5 in
Step-by-step explanation:
The area of a circle is given by the formula
A = pi *r^2
We know the area = 78.5 in^2 (volume would be in^3 area is in^2)
78.5 = 3.14*r^2
Divide each side by 3.14
78.5/3.14 = 3.14/3.14*r^2
25 = r^2
Take the square root of each side
sqrt(25) sqrt(r^2)
5 =r
Answer:
2
Step-by-step explanation:
So in the equation -2x + 3 if we substitute the x for 1 in parenthesis it will look like this.
-2(1) + 3
So -2*1 is -1.
So if we add -1 and 3 we get <em><u>2</u></em>.
Answer:
9, 11, 13
Step-by-step explanation:
Let n represent the smallest of the integers. Then n+4 is the largest of them. The given total is ...
n + 4(n+4) = 61
5n +16 = 61
5n = 45 . . . . . . subtract 16
n = 9 . . . . . . . . divide by 5
The smallest of the integers is 9, so the other two are 11 and 13.
Answer: $869.90 × 12 = $10,438.80.
Step-by-step explanation:
