It takes 300 N to move a box 10 meters in 10 seconds. How much power is
required?

300J

The total work done or energy transferred is equal to the product of the force and the displacement in the direction of the force applied.

In this case it would be

300N x 10m to get 3000J.

This energy is transferred in 10 seconds and since power is energy transferred per unit time.

3000J ÷ 10 = 300 Watts or 300 Joules per second.

so your answer is 300 W

wavelegth as in spectrum red oygbiv

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form