Austin buys 4 boxes of nails for his project. there are 30 nails in each box. how many nails does austin buy in all

Your answer would be 120 because you would multiply 4 * 30 
hope this helps :)

What? are u trying to do a genetic test?

(a) is not correct because one does not get increased cholesterol  from lifting weights.(b) is not correct because lifting weights cannot reduce the risk of a hereditary disease.(c) is not correct because back pain isn't a benefit! and plus, if he lifts weights properly, he should not have back pain.(d) is the correct answer because his ligaments will gain mass, making it easier for him to carry heavier weights and he will also be stronger!