Answer:
c
Step-by-step explanation:
Given:
f(x) = 620e^7.8x
The standard equation for an exponential function is f(x) = Aoe^bx
where Ao is the initial amount
b is the growth factor
so, in this case, the initial amount is 620 and the growth factor is 7.8
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Step-by-step explanation:
the small and the large triangles are similar triangles.
they have the same angles. and the corresponding sides correlate to each other with the same ratio for every pair of sides.
so,
28 / 82 = (2x + 8) / ((2x + 8) + (5x -4)) =
= (2x + 8) / (7x + 4)
(7x + 4)×28 = (2x + 8)×82
196x + 112 = 164x + 656
32x = 544
x = 17
