Answer:
Hey there!
Step 1:

Write the equation
Step 2:

take 6 to other side to divide it with-42

after dividing 6 with -42 we will get -7

Let
x-----------> <span>the side length of a pyramid square base
h-----------> t</span>he height of the sculpture <span>in the shape of a pyramid
we know that
h=(x-3)
Volume=162 cm</span>³
Volume=x² *(x-3)/3
then
x² *(x-3)/3=162----------> x³-3x²=486----------> x³-3x²-486=0
x³-3x²-486=0-------- <span>this equation can be used to find the length of the sculpture’s base
using a graph tool-----------> </span>to find the solution
x=9 cm -------------> see the attached figure
h=(x-3)-----> h=9-3--------> h=6 cm
the answer is
<span>
the length of the sculpture’s base is 9 cm</span>
the height of the sculpture is 6 cm
1 gallon is 20 miles so if u driving 600 miles 600/20=30 thats 30 gallons u need 30 times 2.159 is 64.77 so
$64.77
Your answer would be -15.41. If you ever need any other kind of help, just ask me.