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Butoxors [25]
3 years ago
7

Find the surface area of the cylinder. Use a ~ 3.14 20 m​

Mathematics
1 answer:
lesantik [10]3 years ago
6 0

Answer:

1444.4 m2

Step-by-step explanation:

Surface Area = 2 * 3.14 * (R*R + R*L) = 2 * 3.14 * (10*10+10*13) = 1444.4 m2

Note .. You can Derive this  

"Surface Area = 2 * 3.14 * (R*R + R*L)"

Using Calculus by differentiating its Volume

V = 3.14 * R * R * L

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Tabular representations for the functions f, g, and h are given below. Write g(x) and h(x) as transformations of f(x).
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What is the range of the function shown in the graph?<br>​
Vika [28.1K]

Answer:

y ≥ 2

Step-by-step explanation:

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2 trig ratios missing sides and angels
ivanzaharov [21]

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D

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Using the cosine ratio in the right triangle.

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3 years ago
Marsha is buying a new cell phone. She has a 45% off coupon from the store. She pays $275 for the cell phone. What is the price
jekas [21]

Answer:

The price of the cell phone without the coupon= $500

Step-by-step explanation:

Step 1: Express discounted amount

The discounted amount can be expressed as a function of the original  cost of the phone as follows;

D=r×A

where;

D=discounted amount

r=coupon rate

A=original price of the cell phone before the coupon

In our case;

r=45%=45/100=0.45

A=a

replacing;

Discounted amount=(0.45×a)=0.45 a

Step 2: Amount she pays up

Amount she pays=Original cost of cell phone-discounted amount

where;

Amount she pays= $275

original cost of cell phone=a

discounted amount=0.45 a

replacing;

$275=a-0.45 a

0.55 a=275

a=275/0.55

a=500

The price of the cell phone without the coupon= $500

7 0
3 years ago
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