A company rents water tanks shaped like cylinders. Each tank has a radius of 3feet and a height of 2 feet. The cost is $4per cubic foot. How much does it cost to rent one water tank? Use for , and do not round your answer.

$226.08

Step-by-step explanation:

Volume of a cylinder = πr²h

Radius = 3 feet

Height = 2 feet

Volume = πr²h

= 3.14 × 3² × 2

= 3.14 × 9 × 2

= 56.52 feet cubed

Cost to rent one water tank:

= $4 × 56.52

= $ 226.08

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204