Which function has real zeros at x = 3 and x = 7? f(x) = x2 + 4x – 21
f(x) = x2 - 4x – 21
f(x) = x2 – 10x + 21
f(x) = x2 – 10x - 21

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6

An of a of 60. a of 36 is . isbe ?to .