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Oduvanchick [21]
3 years ago
11

Find the surface area of the prism or pyramid. Round to the nearest hundredth if necessary.

Mathematics
1 answer:
son4ous [18]3 years ago
4 0

Answer: 345.4

Step-by-step explanation:

SA=2πr^2+2πrh

SA=2(3.14)(5)^2+2(3.14)(5)(6)

SA=2(3.14)(25)+2(3.14)(30)

SA=2(78.5)+2(94.2)

SA=157+188.4

SA=345.4

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I need to know what to do
dolphi86 [110]
1) First, you would need to create an equation for this problem. Let x represent the unknown percentage.
\frac{35}{185} = \frac{x}{100}

Next, you would cross multiply. 
185x = 3,500

Now, all you would have to do is isolate the x. To do this, you would divide both sides by 185. 
x = <span>18.918%

Your answer was correct!

2) </span>First, you would need to create an equation for this problem. Let x represent the unknown 85%. 
\frac{x}{190}<span> = </span>\frac{85}{100}<span>

</span>Next, you would cross multiply. 
100x = 16150<span>

</span>Now, all you would have to do is isolate the x. To do this, you would divide both sides by 100. 
x = 161.5

3) First, you would need to create an equation for this problem. Let x represent the unknown percentage.
\frac{24}{128} = \frac{x}{100}

Next, you would cross multiply. 
128x = 2,400

Now, all you would have to do is isolate the x. To do this, you would divide both sides by 128. 
x = 18.75%


I hope this helps!
3 0
3 years ago
The relationship between altitude and the boiling point of a liquid is linear. At an altitude of 8100 ft, the liquid boils at 20
Zinaida [17]

9514 1404 393

Answer:

  b = -0.0012a +211

  208.36 °F at 2200 ft

Step-by-step explanation:

We are given two points:

  (a, b) = (8100, 201.28) and (4300, 205.84)

The slope of the desired line can be found using the slope formula:

  m = (y2 -y1)/(x2 -x1)

  m = (205.84 -201.28)/(4300 -8100) = 4.56/-3800 = -0.0012

The "y-intercept" of the function can be found from ...

  y-intercept = b -ma

  y-intercept = 201.28 -(-0.0012)(8100) = 211.00

So, the function of interest is ...

  b = -0.0012a +211

__

At 2200 ft, the boiling point is ...

  b = -0.0012×2200 +211 = -2.64 +211 = 208.36

The boiling point of the liquid at 2200 ft is 208.36 °F.

8 0
3 years ago
The temperature outside dropped 13 degrees Fahrenheit in 7 hours. The final temperature was -2 degrees Fahrenheit. What was the
inysia [295]

Answer:

Step-by-step explanation:

11 degrees. 13 + -2 = 11. The starting temperature was 11 degrees farenheit

4 0
3 years ago
What is the length of segment XY?
Brilliant_brown [7]

Answer:

StartRoot 53 EndRoot units

XY = √53

Step-by-step explanation:

Choose which is point 1 and point 2 so you don't confuse the coordinates.

Point 1 (–4, 0)    x₁ = –4   y₁ = 0

Point 2 (3, 2)      x₂ = 3    y₂ = 2

Use the formula for the distance between two points.

L = \sqrt{(x_{2}-x_{1})^{2} + (y_{2}-y_{1})^{2}}

XY = \sqrt{(3-(-4))^{2} + (2-0)^{2}}

XY = \sqrt{49 + 4}

XY = \sqrt{53}

Therefore the line of segment XY is √53.

6 0
3 years ago
Read 2 more answers
Cathy recorded the percent of her clothing that is Red, Yellow, Blue, or Orange. The results are shown in the table. If Cathy ha
AleksandrR [38]
There are 145 total pieces . you must first convert 20% to a decimal by placing a decimal point two places from the right. 20% = .20
then you mulitiply 145 x .20 = 29
So, Cathy owns 29 pieces of yellow clothing.
7 0
3 years ago
Read 2 more answers
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