Math help please!!!!!

Question

Find the area of the circles. Use 3.14 for . Show ALL WORK!

Answer 1

Let's do 1).

Area = pi*(radius)^2 = pi*(12 in)^2 = 3.14*12*12 in^2= 3.14*144 in^2 = 452.16 in^2.

Answer 2

#1 area = pi* r^2

12*12*3.14=452.16 sq. in

#2 14*14*3.14=615.44 sq. km

#3. First you divide the diameter by 2 to get the radius 13/2=6.5

area=6.5*6.5*3.14=132.665 sq km

#4 254.34=3.14 r^2 first divide both sides by 3.14

254.34/3.14=3.14/3.14 r^2

81=r^2 take the square root of both sides

r=9 cm multiply by 2 for the diameter. Diameter=18cm