At t=0.0 s, a truck is traveling east at a constant speed of s = 86.9...

  

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At t=0.0 s, a truck is traveling east at a constant speed of s = 86.9 km/h. At an intersection d = 39.9 km ahead, a car is traveling north at constant speed of v = 54.1 km/h. 25% Part (a) Write an expression for the distance, r, between the truck and the car as a function of time. Use the variables from the problem statement for your equation. r(t)= | A25% Part (b) Write an expression for the time at which the distance between the car and the truck has its minimum value. Use the variables from the problem statement for your equation. 25% Part (c) What is the time, in hours, at which the distance between the car and the truck has its minimum value? A 25% Part (d) What is the minimum distance, in kilometers, between the car and the truck? At t=0.0 s, a truck is traveling east at a constant speed of s = 86.9 km/h. At an intersection d = 39.9 km ahead, a car is traveling north at constant speed of v = 54.1 km/h. 25% Part (a) Write an expression for the distance, r, between the truck and the car as a function of time. Use the variables from the problem statement for your equation. r(t)= | A25% Part (b) Write an expression for the time at which the distance between the car and the truck has its minimum value. Use the variables from the problem statement for your equation. 25% Part (c) What is the time, in hours, at which the distance between the car and the truck has its minimum value? A 25% Part (d) What is the minimum distance, in kilometers, between the car and the truck?