Perpendicular slopes have a product of -1, thus
solve for "d"
The product will have 9 digits after decimals . This is because the number of decimal points are added in multiplication.
For eg. 2.5×2.5=6.25 , 0.5×0.5=0.25 .
There are 176 ounces to be divided by 12
176÷12 = 14.6667