You can complete three-tenths of a task in an hour. Your friend can complete one-fifth of the same task in an hour. How long will it take to complete the task if you work together? Explain.
hours.

2 hours

Step-by-step explanation:

If you convert 1/5 to tenths it's 2/10.

If you add 2/10 and 3/10 you get 5/10 which would be how much off the task you got done in one hour.

Therefore you times 5/10 by 2 and you get 10/10 so the task is done and it took 2 hours.

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!

1.0

step-by-step explanation: