Im a few hours past the deadline help pls

311 cm squared

Step-by-step explanation:

Formulas/things to know:

area of circle = pi times r^2

diameter = r * 2

pi = 3.14159

r = radius

CIRCLE 1:

diameter 36, radius = 36/2 = 18

area of circle = pi times 18^2

3.14159 times 324

= 1017.87601976

CIRCLE 2:

diameter 30, radius = 30/2 = 15

area of circle = pi times 15^2

3.14159 times 225

= 706.858347058

Great, now we can calculate the difference between the areas!

1017.87601976 - 706.858347058

= 311.017672702

and then round to the nearest square centimeter: 311

311 cm squared

note: make sure to round at the end, not after calculating area for the most accurate result! :) Hope this helped

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: