Meyer used 6 loads of gravel to cover 2/5 of his driveway. how many loads of gravel will he need to cover the entire driveway?

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for