In its first two months, a small business had profits of -$402 and -$390. If the total profit for the first five months was -$1038, what was the average
profit for months 3-5? Show your work.

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Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?

Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?