Final answer:
The pump fills at 20 gallons per minute, and in 3 minutes, it will deliver a total of 60 gallons of water.
Step-by-step explanation:
If a pump fills a pool at a rate of 20 gallons per minute, you can find the total volume of water pumped in 3 minutes by multiplying the rate (20 gallons/minute) by the time (3 minutes). Therefore, the calculation is as follows:
20 gallons/minute × 3 minutes = 60 gallons.
The pump will deliver 60 gallons of water in 3 minutes. Therefore, the correct answer is B. 60 gallons.The question is asking which polar coordinates represent the same point as (4, -π/2). Polar coordinates specify a point by its distance from the origin, r, and the angle, θ, from the positive x-axis. The given point (4, -π/2) has a distance of 4 from the origin and is π/2 radians clockwise from the positive x-axis, placing it on the negative y-axis.