If an author can type 2500 words in 5 minutes, how many words can he type in 210 minutes?

105,000

Step-by-step explanation:

2500/5 gives you 500 x 210 =105,000

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.