What's the answer for all of them?

At 6 1/2 cents per pound of string beans how much does 7 pounds cost

Solve for x. −3/4(x+2)=6 enter your answer in the box

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