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kvv77 [185]
3 years ago
10

Sam opened a money-market account that pays 2% 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?
Mathematics
1 answer:
I am Lyosha [343]3 years ago
8 0
I = prt
420 = 7000 x .02 x t
420 = 140 x t
420/140 = 140 x t /140
t = 3 years
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