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3 years ago

Surface Area of Cylinders - Item 1175

Mathematics

1 answer:

mylen [45]3 years ago

5 0

The surface area is 47.1 sq in.

Step-by-step explanation:

Given,

The height (h) of the coin (cylinder shaped) = 5 inches

The radius (r) = 1.5 inches

To find the surface area of the coin.

We need to find the lateral surface area of the coin.

Formula

The surface area of the coin of radius r and height h is 2πrh.

Now,

Putting the value of h and r and π=3.14 we get,

Area = 2×3.14×1.5×5 sq inches

= 47.1 sq in

Hence, the surface area is 47.1 sq in.

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Answer:

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3 years ago

Use the number line below, where RS = 6y + 3, ST = 4y + 7, and RT = 60.

Mama L [17]

Answer:

Step-by-step explanation:

RS + ST = RT

6y + 3 + 4y + 7 = 60

6y + 4y + 3 + 7 = 60

10y + 10 = 60

10y = 60 - 10

10y = 50

y = 50/10

y = 5

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3 years ago

Read 2 more answers

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Helga [31]

Don't know how to type the symbole infront of the 50 so I will subsitute
£50=$50

so 1:4
add it up
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so 5 total units
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divide by 5
$10=1 unit

so 1:4=10:10 times 4=10:40

the answer is 10:40

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3 years ago

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Penny caught a fish that weighed 2.9 lbs. The fish Harold caught weighs 60%

IrinaVladis [17]

Answer:

4.64

Step-by-step explanation:

2.9 x 1.60=4.64

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3 years ago

Does anyone know how to solve this?

Margarita [4]

Answer:

The correct option is c.

Step-by-step explanation:

Given that,

u = 7i+4j and v = 2i-3j

We need to find the product of u and v. The dot product of two vectors is given by :

$u{\cdot}v=(7i+4j){\cdot} (2i-3j)\\\\=(7i)(2i)+(4j)(-3j)\\\\=14-12\\\\=2$

So, the dot product of u and v is equal to 2.

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3 years ago