Question

Pre-calculus 12 question!


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Answer 1

I know how to solve everything except part d.

Answer 2

I believe we have to solve like this

24000= the equation

I do not know how to do it algebrically

Answer 3

just make the function p(t) = 24,000 and solve for t

Answer 4

I do not know how to solve it algebraically.

Answer 5

we could try using desmos?

Answer 6

ok

Answer 7

this is a quartic function, so very hard to solve algebraically

Answer 8

have you used desmos?

Answer 9

yes

Answer 10

I have it now, let me send you the link.

https://www.desmos.com/calculator

x^4-20x^3-20x^2+1500x+15000 plug in this

Answer 11

no plug in x^4 - 20t^3-20t^2+1500t-9000

Answer 12

then look at the x value where it crosses the axis

Answer 13

18.03 :) that is the answer. We know for sure -ve time does not exist. Thank you