Definition: The ___ rate of a changing quantity is the amount it changes per single increment of time (or other quantity).

Example: 45 miles per hour; $50 per pound

the answer is b

step-by-step explanation:

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.

b.my answer is b.

brainliest

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour