How do you do this question? include sketch if possible.

B. The distance is decreasing at a rate of 120/√3 miles per hour.

Step-by-step explanation:

Use Pythagorean Theorem to find the distance between the car and the radar monitor.

d² = y² + ¼²

Take derivative with respect to time:

2d dd/dt = 2y dy/dt

d dd/dt = y dy/dt

Use the first equation to solve for y when d = ½:

½² = y² + ¼²

y = ¼√3

Now find dy/dt given that dd/dt = -60:

(½) (-60) = (¼√3) dy/dt

-30 = (¼√3) dy/dt

-120 = √3 dy/dt

dy/dt = -120/√3

The distance is decreasing at a rate of 120/√3 miles per hour.

5 pm

step-by-step explanation: