Please help me with this! Image attached! Please answer with good explanation!

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?