Question 1179894
c=k*w*l
470.40=k*12*16=192k
k=2.45
now use k in the second part.
cost=2.45*10*25=$612.50
as the product of width and length increases, cost increases.  Here the product to begin with was 192 and the end was 250, so the cost should increase by a factor of 250/192 or 1.302 (rounded).