Answer:
Part 1)

Part 2)

Part 3) Bag A
ounces for

Part 4)

Part 5)

Explanation:
we know that
A Unit Rate is the ratio of two measurements in which the second term is equal to one
Part 1)

rewrite

the second term is equal to one
therefore
Is a unit rate
Part 2) To find the unit rate divide the total miles by the total hours
so

Part 3)
Find the unit price of each bag
Bag A ------->

Bag B ------->

Bag C ------->

The best buy is the bag A ( is the smallest unit price)
Part 4) we know that
Samantha types
words per minute
so
by proportion
Find how many words type in
minutes

Part 5) How many miles can a car travel on
gallons of gas if it travels
miles on 1 gallon of gas
by proportion
