I WILL GIVE BRILLIANTS

(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.

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870