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3 years ago

the. radio of the radius and height of a cylinder 2:3 if the volume is 12.936cm cube find tsa of cylinder

Mathematics

1 answer:

gulaghasi [49]3 years ago

7 0

Answer:

30.79 cm^2 ( to nearest hundredth).

Step-by-step explanation:

Height = 3/2 of the radius ( as the ratio of r to h = 2:3.).

h = 3r/2. or 1.5r.

Volume of the cylinder = π r^2 h = 12.936

So π r^2 1.5r = 12.936

r^3 = 12.936 / (π * 1.5r)

r = 1.4 and h = 1.4 * 3/2 = 2.1

Total surface area 2π r^2 + 2πrh

= 2π(1.4)^2 + 2π1.4*2.1

= 9.8π

= 30.79 cm^2 answer

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Penny is going to fly her plane to her sister's house, which is 544.32 miles away. Penny's airplane flies at an average speed of

Sedbober [7]

Answer:

0.81 hour

Step-by-step explanation:

Given data

Distance= 544.32 miles

Speed= 672 miles per hour.

We know that

Speed= distance/time

Substitute

672= 544.32/time

cross multiply

time*672= 544.32

time= 544.32/672

time= 0.81 hour

3 0

3 years ago

Is P - 1 upon p = 4 find P + 1 upon p whole square

zlopas [31]

Given that (p - 1/p) = 4, the value of p² + 1/p² is 18. Detail below

<h3>Data obtained from the questio</h3>

(p - 1/p) = 4
p² + 1/p² = ?

<h3>How to determine the value of p² + 1/p²</h3>

(p - 1/p) = 4

Square both sides

(p - 1/p)² = (4)²

(p - 1/p)² = 16 ....(1)

Recall

(a - b)² = a² + b² - 2ab

Thus,

(p - 1/p)² = p² + 1/p² - (2 × p × 1/p)

(p - 1/p)² = p² + 1/p² - 2

From equation (1) above,

(p - 1/p)² = 16

Therefore,

p² + 1/p² - 2 = 16

Rearrange

p² + 1/p² = 16 + 2

p² + 1/p² = 18

Thus, the value of p² + 1/p² is 18

Learn more about algebra:

brainly.com/question/953809

#SPJ1

6 0

2 years ago

Which of the two solids below are similar ?

Pachacha [2.7K]

Answer: I and II.

Step-by-step explanation:

By definition, two solids are similar if their corresponding sides are in the same ratio.

Knowing this, let's find which solids are similar:

Corresponding sides ratio of solids I and II:

$\frac{3}{2}=\frac{2}{\frac{4}{3}}=\frac{5}{\frac{10}{3}}$

$\frac{3}{2}=\frac{3}{2}=\frac{3}{2}$

Corresponding sides ratio of solids I and III:

$\frac{3}{\frac{9}{2}}=\frac{2}{3}=\frac{5}{8}$

$\frac{2}{3}=\frac{2}{3}=\frac{5}{8}$

Corresponding sides ratio of solids II and III:

$\frac{2}{\frac{9}{2}}=\frac{\frac{4}{3}}{3}}=\frac{\frac{10}{3}}{8}}$

$\frac{4}{9}=\frac{4}{9}=\frac{5}{12}$

You can observe that the solids I and II are similar.

3 0

3 years ago

Round 34,689.37 to:<br><br><br> a. the nearest tenths:<br><br><br><br> b. the nearest thousands:

Irina18 [472]

Answer:

A. 34,689.370

b.35,000.00

Step-by-step explanation:

3 0

4 years ago

Plz help!

patriot [66]

f(x) = −2x + 12, find f(x) when x = −3.

replace x = -3 then

f(-3) = (-2)(-3) + 12

= 6 + 12

=18

Answer is C) f(−3) = 18

f(p)=7/11p-10 Find f(77)

f(77) = 7/11 (77) - 10 (cancel out 77 and 11)

= 7 * 7 - 10

= 49 -10

=39

Answer is D) f(77) = 39

5 0

3 years ago