Find the simple interest earned by each account. $1,200 principal at 5.5% interest for 25 years
2 answers:
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Answer:
y = 20
Step-by-step explanation:
Use the points to find the values of a and b
Using (0, 20 ) , then
20 = a [
= 1 ] , then
20 = a
y = 20
Using (3, 1280 ) , then
1280 = 20 b³ ( divide both sides by 20 )
64 = b³ ( take the cube root of both sides )
= b , that is
4 = b
Then exponential function is
y = 20.