The length of a swimming pool is 22 ft. the width is 40 ft. if the volume of the pool is 2,500 ft³, which equation below could be used to find the depth of the pool? a.(22 + 40)x = 2500 b.22 + 40 + x = 2500 c.66x = 2500 d.22 • 40 • x = 2500

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.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Atorch and a battery cost 2.50 altogether. the torch costs 1.50 more than the battery. what fraction of the total price is the torch? give your answer in its simplest form.