Answer:
141.4
Step-by-step explanation:
Plug the numbers into the formula, V=πr2h, you know that your radius is 3 and your height is 5, so you get V=π(3)2(5), you just then put it in the calculator. You get 141.37, round to the nearest tenth 141.4
Answer:
B
Step-by-step explanation:
![\frac{3+4\iota}{2+4\iota}=\frac{3+4 \iota}{2+4\iota} \times \frac{2-4 \iota}{2-4 \iota}\\=\frac{6 -12 \iota+8 \iota-16 \iota^2 }{4-16 \iota^2 }\\=\frac{ 6-4 \iota+16}{4+16}\\=\frac{22-4 \iota}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B3%2B4%5Ciota%7D%7B2%2B4%5Ciota%7D%3D%5Cfrac%7B3%2B4%20%5Ciota%7D%7B2%2B4%5Ciota%7D%20%5Ctimes%20%5Cfrac%7B2-4%20%5Ciota%7D%7B2-4%20%5Ciota%7D%5C%5C%3D%5Cfrac%7B6%20-12%20%5Ciota%2B8%20%5Ciota-16%20%5Ciota%5E2%20%20%7D%7B4-16%20%5Ciota%5E2%20%20%7D%5C%5C%3D%5Cfrac%7B%206-4%20%5Ciota%2B16%7D%7B4%2B16%7D%5C%5C%3D%5Cfrac%7B22-4%20%5Ciota%7D%7B20%7D)
You would use 1.73 in order to decrease an amount by 73%