3 years ago

Please help me with this

Mathematics

1 answer:

mariarad [96]3 years ago

5 0

Answer:

Easy, 15

Step-by-step explanation:

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This soda can is going to be made from aluminum. How many square centimeters of aluminum are needed if the radius r = 3.5 cm and

kari74 [83]

208.81 square centimeters of aluminium are needed

Solution:

Given that,

Radius = 3.5 cm

Height = 6 cm

We have to find the square centimeters of aluminum needed

So we have to find the surface area of cylinder

The surface area of cylinder is given by formula:

$A = 2 \pi r(h+r)$

Where "r" is the radius and "h" is the height of cylinder

Substituting the values we get,

$A = 2 \times 3.14 \times 3.5 \times (6+3.5)\\\\A = 21.98 \times 9.5\\\\A = 208.81$

Thus 208.81 square centimeters of aluminium are needed

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2 years ago

Gabrielle is 9 years younger than Mikhail. The sum of their ages is 75 . What is Mikhail's age?

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Answer: We know Gabrielle is 9 yrs younger than Mikhail hence it will be x-9 yrs. Sum of their ages is 87. Mikhail's age is 48 yrs.

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2 years ago

You scored 31 out of 40 points on a test. What percent did you get?

elena-14-01-66 [18.8K]

Answer:

Step-by-step explanation:

Divide 31 by 40. Since you get .775, you make it a percent and it's 77.5% correct.

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2 years ago

How many terms are there in the following expression: 3a + 3ab + 7b – 2c – 4d

Anastasy [175]

Lets count...
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3ab...thats 2
7b....thats 3
-2c....movin on up to 4
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so this expression has 5 terms since none of the terms can be combined :)

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2.7 is the answer you should get help

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