Which polynomial represents the difference below ?

C. -7x⁸ + 5x⁷ - 11x + 2

Step-by-step explanation:

5x⁷ - 8x + 2 - (7x⁸ + 3x)

= -7x⁸ + 5x⁷ - 8x - 3x + 2

= -7x⁸ + 5x⁷ - 11x + 2

4 times

Step-by-step explanation:

1 quart is equivalent to 32 fluid ounces.

If each eruption consumes 8 fluid ounces of vinegar. Assuming that the amount of vinegar required per eruption is constant, the number of times Tanvi can make her volcano erupt is:

Tanvi can make her volcano erupt 4 times  with 1 quart of vinegar.