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Anna [14]
3 years ago
14

HELP PLZ REALLY NEED IT

Mathematics
2 answers:
NISA [10]3 years ago
7 0

The formula for the surface area is given and as follows.

SA = (2)(3.14)(r^2) + (2)(3.14)(r)(h)

The radius of the cylinder is 4 inches and the height is 9 inches. Using the given values, we can plug them into the formula and solve for the surface area from there.

SA = (2)(3.14)(4^2) + (2)(3.14)(4)(9)

SA = (6.28)(16) + (6.28)(36)

SA = 100.48 + 226.08

SA = 326.56 in^2

Hope this helps!! :)

otez555 [7]3 years ago
3 0

Answer:

The answer to your question is   SA = 326.56 in²

Step-by-step explanation:

Data

pi = 3.14

height = 9 in

radius = 4 in

Formula

     SA = 2πr² + 2πrl

Process

This process is very easy to solve because we have all the values and the formula so, just substitute the values and simplify.

-Substitution

     SA = 2(3.14)(4)² + 2(3.14)(4)(9)

-Simplification

     SA = 100.48 + 226.08

-Result

    SA = 326.56 in²

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Answer:

The price where the manufacture sells the maximum number of toys is $20

Step-by-step explanation:

The given equation for that represents the number of toys the manufacturer can sell is given as follows;

T = -4·p² + 160·p - 305

Where;

p = The price of the toys in dollars

At the point where the manufacture sells the maxim number of toys on the graph of the equation T = -4·p² + 160·p - 305, which is the top of the graph, the slope = 0

Therefore, at the maximum point;

The slope = 0 = dT/dp = d(-4·p² + 160·p - 305)/dp = -8·p + 160

∴ -8·p + 160 = 0

160 = 8·p

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The price where the manufacture sells the maximum number of toys is = p = 20 dollars

4 0
3 years ago
What is the common factors of 20,25,40?
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Answer:

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Step-by-step explanation:

\frac{1}{(x - 1)}  -  \frac{3}{(1 - x)}   + 2

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