Wihich of the following expressions has a value of 4?

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

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.

M.xyz =radians. covert this radian measure to its equivalent measure in degrees.