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2 years ago

Work out the surface area of this cylinder

Mathematics

2 answers:

IgorLugansk [536]2 years ago

6 0

Answer:

A=2πrh+2πr2=2·π·2·4+2·π·22≈75.39822

Step-by-step explanation:

Airida [17]2 years ago

4 0

Answer:

Step-by-step explanation:

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the number of states that entered the union in 1889 was half the number of states "s" that entered in 1788. which expression sho

blondinia [14]

Answer:

x = s/2

Step-by-step explanation:

● s states have joined the union in 1788

● half of s have joined in 1889

Let x be the number of states that have joined in 1889

● x = (1/2)× s

● x = s/2

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3 years ago

Please help really quick I really need some help with this question

Marta_Voda [28]

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2 years ago

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Annette [7]

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2 years ago

seneca combines 1.33 cups of apple juice with 0.65cup of grape juice to make fruit punch how much fruit punch will this make

denis-greek [22]

1.33+0.65 = 1.98 cups of fruit punch

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2 years ago

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Three cube-shaped boxes are stacked one above the other. The volumes of two of the boxes are 1,331 cubic meters each, and the vo

blsea [12.9K]

The volume of a box with dimensions x by x by x is $x^{3}$ .

So if we are given the volume V of a cube-shaped box, the side length of thit is $\sqrt[3]{V}$ .

So we calculate the cubic roots of the volumes we have, and we add their heights.

To calculate the cubic root of 729, we can factorize it, and group the perfect cubes together, as follows:

$\frac{729}{3}= \frac{600}{3} + \frac{120}{3} + \frac{9}{3}=200+40+3=243$

$\frac{243}{3}= \frac{240}{3}+ \frac{3}{3}=80+1=81$ , which we recognize as $3^{4}$

so $729=3*3* 3^{4}= 3^{6}= ( 3^{2} )^{3}= 9^{3}$

similarly 1,331 can be found to be $11^{3}$ .

Thus we have 2 boxes with side length equal to 11 m and one with side length equal to 9 m.

Answer: h= 11+11+9 = 31 (meters)

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2 years ago

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