A*b show that 4 is the identity element of the operation​

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.

answer: 1+1

step-by-step explanation: 1+1 is at least 2

15.36 per mile

but forgot to round

i am pretty sure