Marisol used \$2 (4/3)\$ gallons of paint to paint the walls of her bedroom and 15 a gallon to paint the ceiling. How much paint did she use in all?

Marisol used \$2 (4/3)\$ gallons of paint to paint the walls of her bedroom, which is equivalent to

\$ (2 + (4/3)) \$ gallons

Amount of paint used to paint the ceiling

15 gallons

Now, to find out how much paint she used in total, we need to add the paint used for the walls and the paint used for the ceiling.

Now, add the amount of paint used for the walls and the ceiling:

Total paint used = \$ (2 + (4/3)) \$ gallons (for the walls) + 15 gallons (for the ceiling)

Now, we need to add these quantities. To add them, you need a common the denominator, which is 3:

Total paint used = \$((2 \times 3 + 4) ) / 3\$ gallons (for the walls) + 15 gallons (for the ceiling)

After simplification, we get

Total paint used = \$(6 + 4) / 3\$ gallons (for the walls) + 15 gallons (for the ceiling)

After simplification, we get

Total paint used = \$(10 / 3) \$gallons (for the walls) + 15 gallons (for the ceiling)

Now, add the two quantities:

Total paint used = \$ (10/3) + 15 \$ gallons

To add these fractions, you need a common denominator, which is 3:

Total paint used = \$ (10 + 45) / 3 \$ gallons

After simplification, we get

Total paint used = \$ (55 / 3)\$ gallons

So, total paints used by Marisol to paint the walls and ceiling of her bedroom

\$55/3\$ gallons = 18.33 gallons (rounded to two decimal places)

Marisol used approximately 18.33 gallons of paint in total.

Answer

C