nunezjazmine01
19.03.2020 •
Mathematics
Using the rule of 72.1-
how long will it take for the principal to double with an annual compound interest rate of 6%?
a.6 years
b.9 years
c.12 years
d.15 years
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Ответ:
Step-by-step explanation:
(7, 8) and (3, -4)
y2 = -4, y1 = 8, x2 = 3 and x1 = 7
Slope m = {y2-y1}/{x2-x1}
m = {-4 - 8}/{3 - 7}
m = -12/-4
m = 3
And
y - y1 = m(x - x1)
y - 8 = 3(x - 7)
y - 8 = 3x - 21
y = 3x - 21 + 8
y = 3x - 13