#1**+1 **

10) Joint variation might be a new one to you, NSS

We have this

A = kds^2

Where A is the amount of oil used, d is the distance and s is the speed

As in other types of variation, we need to find the proportionality constant, k

So we know that

30 = k (85) (42)^2 divide both sides by (85)(42)^2

30 / [ (85)(42)^2 ] = k 1 / 4998

So we want to find A for this

A = (1 / 4998) (26) (54)^2 = 15.2 barrels

CPhill Feb 21, 2018