Help me please.

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How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

A50% increase followed by 33 1/2% decrease

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?