Three quarters are 3/4 of a dollar.
I can't really help you with the math but I can give you the formulas for the answers.
Answer:
1.5 per minute
Step-by-step explanation:
unit rate is how many in 1 minute so 45 divided by 30 is 1.5 and if you want to check your answer do 1.5 x 30 which is 45