Mathematics: A profit formula for a single tire can be modeled by the function P(t) = -18 + 850t - 725. Each set of tires can be modeled by the function t(s) = 4s. Which composite function can be used to determine the profit function in terms of the number of sets of tires? P(t(s)= -28852 + 3,400s - 725 P(t(s)) = -28852 + 13,600s - 725 P[t(s)) = -7252 + 3,400s – 2,900 P(t(s)) = -72s2 + 13,600s - 2,900 Save and Exit Submit Mark this and return

Step-by-step explanation:Given --- First, term --- Fourth termRequired: Determine the common ratioThe nth term of a GP isSubstitute 4 for nSubstitute 648 and 3 for T4 and 3 respectively.Take cube roots of both sidesThe common ratio is 6...

A profit formula for a single tire can be modeled

Ответ:

glowbaby123

23.01.2021

Mathematics

r = 6

Step-by-step explanation:

Given

a = 3 --- First, term

T_4 = 648 --- Fourth term

Required: Determine the common ratio

The nth term of a GP is

$T_n = ar^{n-1$

Substitute 4 for n

$T_4 = ar^{4-1$

$T_4 = ar^{3$

Substitute 648 and 3 for T4 and 3 respectively.

$648 = 3 * r^{3$

r^3 = 216

Take cube roots of both sides

$r =\sqrt[3]{216}$

r = 6

The common ratio is 6

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