Please help on this question

3 people can plow a field in 450 minutes.

Step-by-step explanation:

This is a rate/ratio problem, so we have to make sure it's fully simplified.

First, you already know the ratio is 2 people can plow a field in 5 hours, so 2:5.

But that's not the unit rate.

To find the unit rate, you find how much an individual by itself can do their work, and divide numerator by denominator.

In this case, you do 5/2: which is 2.5.

It take's 2.5 hours for one person. Now you multiply by 3 people to get the ratio; since you already found the rate.

2.5x3 is 7.5, and that's in hours. 1 hour is 60 minutes, to find 7 hours, you do 60x7 and get 420 minutes. You add 30 minutes from the remaining half hour.

that results in 450 minutes.

3 people can plow a field in 450 minutes.

then, the surface area of the sphere shown in the image is: 256π sq. units!

step-by-step explanation:

the lateral surface area of a sphere is 2πrh where h=2r.

then:

surface area = 4πr^2.

in this case, r=8 units ⇒ surface area = 4π(8 units)^2. = 256π sq. units!

then, the surface area of the sphere shown in the image is: 256π sq. units!

x + 4/7

step-by-step explanation:

use cymath