Ralph spends 15 1/3 hours per month playing tennis. how many hours does he play tennis in a year? (there are twelve months in a year.)

a. 164
b. 182 2/3
c. 184
d. 164 1/3

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?