#1**+2 **

3.141 * 15^2 * 18/3 = **4240.35**

This is the exact answer, so there is actually no need for rounding.

CubeyThePenguin Feb 5, 2022

#2**+2 **

Since \(3.141*15^2 * \frac{18}{3} = 3.141 * 225 * 6 \) (1)

\(= 3.141*5 * 45 * 2 * 3 \)(2)

\(= 3.141 * 45 * 3 * 10\)(3)

\(= 31.41 * 135\)(4)

\(= 4240.35\)(5)

Note that from step 3 or 4, we found that we don't need to round it to the nearest hundredth because that is what the answer is in and step 5 tels us the answer.

Emu123 Feb 5, 2022