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3 years ago

11

I’m so confused on how to do it

1 answer:

Monica [59]3 years ago

8 0

Answer:

785.4

Step-by-step explanation:

The formula to find the surface area of a cylinder is

2* pi* radius* height + 2* pi* 2radius.

2( 3.14) (5) (20)= 628

2 (3.14* 5*5)= 157

628+ 157= 785.

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Make r the subject of the formula <br><img src="https://tex.z-dn.net/?f=v%20%3D%20%5Cpi%20%5C%3A%20h%20%7B%7D%5E%7B2%7D%28r%20-%

Vaselesa [24]

Answer:

$\boxed{r = \frac{h}{3} + \frac{v}{\pi {h}^{2} } }$

Step-by-step explanation:

$Solve \: for \: r: \\ = > v= \pi {h}^{2}(r - \frac{h}{3} ) \\ \\ v=\pi {h}^{2}(r - \frac{h}{3} )is \: equivalent \: to \: {h}^{2}\pi(r - \frac{h}{3} ) = v: \\ = > {h}^{2}\pi(r - \frac{h}{3} ) = v \\ \\ Divide \: both \: sides \: by \: \pi {h}^{2} : \\ = > r - \frac{h}{3} = \frac{v}{\pi {h}^{2} } \\ \\ Add \: \frac{h}{3} \: to \: both \: sides: \\ = > r = \frac{h}{3} + \frac{v}{\pi {h}^{2} }$

8 0

3 years ago

Dr. Montgomery recently graduated from medical school and his wife bought him an engraved stethoscope. The stethoscope cost $160

Dima020 [189]

Answer:

$172.80

Step-by-step explanation:

$160.00 x 1.08=$172.80

3 0

3 years ago

These triangles are similar. find Y and X

CaHeK987 [17]

It these triangles are similar, then the sides of the triangles are in proportion:

$\dfrac{y}{10}=\dfrac{y+4}{15}$ <em>cross multiply</em>

$15y=10(y+4)$ <em>use distributive property</em>

$15y=10y+40$ <em>subtract 10y from both sides</em>

$5y=40$ <em>divide both sides by 5</em>

$\boxed{y=8}$

$\dfrac{x}{4}=\dfrac{6}{8}$ <em>cross multiply</em>

$8x=(4)(6)$

$8x=24$ <em>divide both sides by 8</em>

$\boxed{x=3}$

3 0

3 years ago

Jacob weights 36.4 pounds and alice. weights 42.275 pounds. how much do they weigh together

QveST [7]

Answer:

78.675 pounds

Step-by-step explanation:

36.4 + 42.275 = 78.675 pounds

5 0

3 years ago

Read 2 more answers

Sir Isaac Newton wrote the equation (d=1/2 gt^2 to determine the distance (d), in meters, an object falls in a given amount of t

qwelly [4]

Answer:

D) 32g

Step-by-step explanation:

$\displaystyle d=\frac{1}{2}gt^2\\\\d=\frac{1}{2}g(8)^2\\\\d=32g$

3 0

2 years ago