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thedocgalloway
11.11.2021 •
Mathematics
Please help me solve this
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Ответ:
Part A. The standard form of a rate equation is:
y = Ao (1 + r)^x
Where,
Ao = represents the initial value
r = represents the rate of growth
Therefore rewriting the given f(x) equation in this form:
f(x) = 2.96 (1 + 0.04)^x
r = 0.04 = 4%
Hence, the price of fuel A is increasing each month by 4%.
We can prove this by assuming two values of x = 1 and 2 and getting the ratio:
f(x=2) / f(x=1) = 2.96(1.04)^2 / 2.96(1.04) = 1.04
Since ratio is 1.04, therefore there is in fact a 4% increase.
Part B. To determine the growth rate of fuel B, let us take the ratio of months 1 and 2.
3.22 / 3.04 = 1.06
r = 0.6 = 6%
Therefore the fuel with a greater percentage change in price per month is fuel B.