Which expression is equivalent to (5g+3h+4) x 2

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Plot the intercepts to graph the equation

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