Answer:
It doesn't matter which way you do it, you'll still get the same answer. 19 is correct
Step-by-step explanation:
Answer:
5088
Step-by-step explanation:
The initial value of the car is $19340
The rate of decrease is 12.5%
The value of the car after 10 years is given by
Substitute the values to get;
To the nearest dollar we have $5088
The correct answer is choice C
Assume uniformly accelerated motion
Vf = Vo - at => a= [Vo - Vf] / t
Vf = 0, t = 20 s => a = Vo / 20
x = Vot - at^2 / 2
x = Vot - (Vo / 20) * t^2 /2
x = 1775 feet * [1 mile / 5280 feet] = 0.336 mile
t = 20 s
=> 0.336 = 20Vo - Vo(20)^2 /(40) = 20Vo - 10 Vo = 10 Vo
=> Vo = 0.336 /10 = 0.0336 mile /s
Vo = 0.0336 mile/s * 3600 s/h = 120.96 mile / h
Therefore, the car was way over the speed limit.