Find the area of the circle. Round to the nearest tenth. Use 3.14 for π. 14 m circle

615.44 m²

Step-by-step explanation:

3.14(14)²= 615.44 m²

153.9 m²

Step-by-step explanation:

A=πr2Use the formula.

A=π(7)2Substitute. Use 7 for r.

A≈3.14 × 72Substitute. Use 3.14 for π.

A≈3.14 × 49Evaluate the power.

A≈153.9Multiply.

The area of the circle is about 153.9 m².

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

2 apples

step-by-step explanation:

taking away equals subtraction. 6-4=2