How do you solve x3 (y-5) (x-8) (the numbers next to the variables (letters) are supposed to be exponents)

Y^-5
x^-5
because you have to put together all the x and then put all the y's together

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post

Are you trying to figure out the volume?