Answer:
The percent of increase is
15
36
=
0.41666
... around 42%,
and the new price is
$
51
.
The percent of decrease is
15
51
=
0.294
.. about
29
%
and the new price is
$
36
Step-by-step explanation:
To find the total volume of the cylinder you would use the formula V = pi x r^2 x h. When you substitute the values, you would have 3.14 x 5^2 x 30 (make sure you use half of the diameter to represent the radius). This would give us a volume of approximately 2355 cubic centimeters. Because it is only 30% full, you will need to multiply the total volume of 2355 cubic cm by the part that is represented by 30% (0.30 or 30/100). 0.30 x 2355 = 706.5 cubic cm. That is the answer!
Step 1:Solve one of the equations for either x = or y = .
Step 2:Substitute the solution from step 1 into the other equation.
Step 3:Solve this new equation.
Step 4:Solve for the second variable.
I hope this helps!
