Help please its due in a few hours and this is the only question i keep getting wrong (asking this again because i forgot the put the answer choices on the other one)

What is the probability of rolling a single die greater than 4

Consider the function f(x)=-5x+3 what is f(-2)

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.