Remainders are not always needed when you are just rounding. Not everything in math has to be perfect.
Answer:
160π cm²
Step-by-step explanation:
The area of the shaded region is
area of outer circle - area of inner circle
A = πr₁² - πr₂²
r₁ is the radius of the outer circle = 10 + 3 = 13 cm
r₂ is the radius of the inner circle = 3 cm
A = π × 13² - π × 3²
= π(169 - 9) = 160π cm² ≈ 502.65 cm² ( to 2 dec. places )
Step-by-step explanation:
How many people do the intend to invite
Easy! Multiply 100 by 2 and get 200. Then subtract 900 by 2, and get 700. Then you divide 700 by 2 (because there are only 2 sides left!) and BAMMMMMM there’s your answer