Find the domain of the relation on the mapping diagram

For the function, f(x) = -5x 2, find f(-4).

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Masons cell phone company charges $0.12 for every text message he sends plus $2.50 per month if mason sent 25 messages this month how much money does he owe the one with the correct answer and explanation gets 10 points and is marked as the brainliest answer