C(x) = 3x3 + 2x2 − 18x + 11
C(x) = 3x3 + 2x2 − 18x − 11
C(x) = 2x3 + 2x2 − 18x + 11
We have been given that the water usage at a car wash is modeled by the equation , where W is the amount of water in cubic feet and x is the number of hours the car wash is open.
The amount of decrease in water used is modeled by , where D is the amount of water in cubic feet and x is time in hours.
The function C(x) will be difference of W(x) and D(x) that is .
Upon substituting both function values in above formula, we will get:
Let us remove parenthesis.
Combine like terms.
Therefore, the function represents the water used by the car wash on a shorter day and option A is the correct choice.
Answer:
a
Step-by-step explanation:
Step-by-step explanation:
KE = ½ mv²
KE = ½ (800 N / 10 m/s²) (6 m/s)²
KE = 1440 J
180 miles in 3 hours