The base of a cone is a circle.
The area of a circle is

.
Thus, the area of the base of a cone

.
The derivation of the formula for the area of a circle involves a bit of calculus, but if you'd like, I can walk you through it.
Step-by-step explanation:
- volume of cylinder=90π
- πr²h=90π
- 3²h=90
- 9h=90
- h=90/9
- h=10
hope it helps.
Yes this is true ...vergetables give u more energy and strength but they also make your healthier and stronger.
one number that could round to 3 100 when rounded is 3 120
Your answer would be R=-5x-4+y