(1) 34.8 liters
(2) $63.55
Solution:
(1) The question is wrong. it is not 42 gallons, it is 42 liters.
Total capacity of the tank = 42 liters
Quantity of gasoline filled in beginning of the week = 35.8 liters
Quantity of gasoline used during the week = 28.6 liters
Remaining quantity of gasoline in the tank = 35.8 – 28.6 = 7.2 liters
Quantity of gas need to buy = Total capacity – Remaining gas in the tank
= 42 liters – 7.2 liters
= 34.8 liters
Hence Alberto need to buy 34.8 liters of gasoline to fill the tank.
Option B is the correct answer.
(2)
Shamika earns in first week = $25.75
Shamika earns in next week = $37.80
Shamika spends = $32
Total money Shamika have = $25.75 + $37.80
= $63.55
The question is "how much she have", so don't add or subtract spending money.
Therefore Shamika have $63.55 from these two weeks.
