Roberto has eight coins that are all dimes or nickels. They are worth $0.50. How many dimes and how many nickels does Roberto ha
1 answer:
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Answer:
$159
Step-by-step explanation:
we know that
The equation of a exponential growth function is equal to
where
y is the balance in the saving account
x is the number of years
a is the initial amount
r is the percent rate of change
we have
substitute
For x= 1 year
substitute