How to solve.

-3(4r-8)= -36

Multiplying fractions by whole number 5 x 1/3=?

On ryan's last social studies test there were two types of questions true/false worth 3 points each and multiple choice questions worth 4 points each

The half-life of a certain material is 0.004 second. approximately how much of a 20-gram sample will be left after 0.016 second? a. 5 grams b. 16 grams c. 0.32 gram d. 1.25 grams