You bought a truck in 2013 for $40,000 and want to sell it. The depreciation is 15% for used cars/trucks. What is the exponential model for this situation?

40,000(0.85^t)

Step-by-step explanation:

The value each year is 100-15 = 85% of the previous year

85% = 0.85

New value after t years is:

40,000(0.85^t)

By model I'm assuming your meaning equation.

f(x) = 400000(0.85)^n

Step-by-step explanation:

:)

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.