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3 years ago

Work out the surface area of this cylinder.with radius 2 cmand height 4 cm

Mathematics

1 answer:

Tju [1.3M]3 years ago

3 0

Answer:

$75.39cm ^{2}$

Step-by-step explanation:

$area = 2\pi \times r \times h + 2\pi \times {r}^{2} \\ = 2 \times \pi \times 2 \times 4 + 2 \times \pi \times 22 \\ = 75.39822cm ^{2}$

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This trapezium is drawn on a centimetre grid. Find the area of the trapezium.

aivan3 [116]

Answer:

20 unit²

Step-by-step explanation:

A trapezium is given to us on the grid and we need to find out the area of the trapezium . In order to find the area , we need to find the measure of the parallel sides and the distance between the parallel sides.

From the grid :-

$\rm\implies Side_1 = 7 \ units$

$\rm\implies Side_2 = 3 \ units$

$\rm\implies \perp \ Distance =4 \ units$

Now here we got the two parallel sides of the trapezium and the distance between the two parallel sides. Now we can find the area as ,

$\rm\implies Area_{Trapezium}= \dfrac{1}{2}\times ( s_1 + s_2) \times \perp \ Distance \\\\\rm\implies Area = \dfrac{1}{2} \times ( 7 + 3 ) \times 4 \ unit^2 \\\\\rm\implies Area = \dfrac{1}{2} \times ( 10) \times 4 \ unit^2 \\\\\rm\implies\boxed{\rm Area = 20 \ unit^2}$

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3 years ago

A. 0.12 B. 0.13 C. 0.14 D. 0.15 Explain why you chose the answer

blagie [28]

The answer is C. 0.14

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2 years ago

There are 92 students in a chemistry class. The instructor must choose two students at random. Students in a Chemistry Class Aca

Sergio039 [100]

Answer:

0.0108 = 1.08% probability that a sophomore non-Chemistry major and then a junior non-Chemistry major are chosen at random.

Step-by-step explanation:

A probability is the number of desired outcomes divided by the number of total outcomes.

Probability that a sophomore non-Chemistry major

Out of 92 students, 9 are non-chemistry major sophomores. So

$P(A) = \frac{9}{92}$

Then a junior non-Chemistry major are chosen at random.

Now, there are 91 students(1 has been chosen), of which 10 are non-chemistry major juniors. So

$P(B) = \frac{10}{91}$

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0.0108 = 1.08% probability that a sophomore non-Chemistry major and then a junior non-Chemistry major are chosen at random.

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3 years ago

8 and 5 are factors of what number?

madreJ [45]

Answer:

Step-by-step explanation:

8 and 5 are factors of 40. (8 x 5 = 40)

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3 years ago

Given f(x)=4x+6 and g(x)=9x+9 then what is f(g(−6))?

irakobra [83]

To solve this question, you can break it into 2 parts. First evaluate the function g(X)=9x+9 for g(-6). Which is g(-6) = 9(-6)+9 = -45. Then evaluate f(-45). F(-45)= 4(-45)+6= -180+6= -174. The final answer for f(g(-6))= -174.

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3 years ago

Read 2 more answers

Work out the surface area of this cylinder.with radius 2 cmand height 4 cm​

Work out the surface area of this cylinder.with radius 2 cmand height 4 cm