Four friends share the profit of a lawn care service equally. The friends charge $45 per lawn and spend $30 of their total earings on gasoline for the lawnmowers each week. Which inequality can be used to find m, the number of
lawns they need to mow next week so that each person earns at least $275? (14 Points)

A. 45m - 30 over 4 ≥ 275

B. 45m over 4 - 30 ≥ 275

C. 45m - 30 over 4 ≤ 275

D. 45m over 4 - 30 ≤ 275

I think the answer is A. 45m - 30 over 4 ≥ 275

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours