Answer:
176.7cm^2
Step-by-step explanation:
Area of circle = π ×r^2
π×15^2
and then divide by 4 because it's one quarter of a circle
Answer:

Step-by-step explanation:
First find the radius

Now find the CIRCUMFERENCE

Answer:1 over 5 to the 9th power (1 over 1953125).
Step-by-step explanation:
5^-6/5^3 hard to show fractions and exponents, but since 5^-6 is a negative exponent you must flip in, or put it on the bottom. So now you have 1 over 5 to the 9th power(1/5^9), or more simplified 1 over 1953125(1/1953125).
I would say pick the second diagram. And 25 hours.