(b) Write the ratio 12:30 in the form 1:n

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The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

Acredit union pays 5% annual interest, compounded daily, on savings deposits. find the value after one year of $500 deposited in this account. $525.64 $25.64 $20.40 $520.40