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3 years ago

-5a-5b/a+b need help now please!!!!

Mathematics

1 answer:

valentina_108 [34]3 years ago

6 0

Your answer should just be -5

<em>I'm just a few Brainliests away from ranking up, so one would be much appreciated. Thank you!</em>

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A water storage tank has the shape of a cylinder with diameter 14 ft. It is mounted so that the circular cross-sections are vert

andrezito [222]

Answer:

percentage of the total capacity is 75.6%

Step-by-step explanation:

Hello! To solve this problem we follow the following steps

1. draw the complete scheme of the problem (see attached image)

2. To solve this problem we must find the area of the circular sector using the following equation.(c in the second attached image)

$A=\frac{R^2}{2} (\alpha -sin\alpha )$

$\alpha =2arccos(\frac{d}{R})$

3. observing the attached images we replace the values in the equations and find the area of the circular sector, remember that you must transform the angle to radians

$\alpha =2arccos(\frac{5}{7})=88.83$

$A=\frac{R^2}{2} (\alpha -sin\alpha )\\A=\frac{7^2}{2} (88.83-sen88.83)*\frac{\pi rad}{180} =37.57ft^2$

4.we calculate the area of the total circle (At), then subtract the area of the circular sector (Ac) to find the area occupied by water (Aw)

$At=\frac{\pi }{4} (14ft)^2=153.93ft^2$

Aw=At-Ac=153.93-37.57=116.36ft^2

5.Finally, we calculate the percentage that represents the water in the tank by dividing the area of the water over the total area of the tank

$\frac{116.36}{153.93} *100=75.6$

percentage of the total capacity is 75.6%

3 0

3 years ago

Anyone know the answer to this?

Lunna [17]

93 x 2 = 186

x = 186 - 112
x = 74

y = 2(80) - 74
y = 160 -74
y = 86

360 - 112 - 74 - 86 = 88
z = (88+86)/2
z = 87

4 0

3 years ago

based on the graphic, what can be inferred about the relationship between braking distance and tread depth of tires ?

Reil [10]

Answer: A

Step-by-step explanation:

5 0

3 years ago

Jane bought an item for $40 that, after seeing it had a 20% discount. janes friend said the original price was $48. is she right

ale4655 [162]

Jane's friend is wrong, the original price would be $200

6 0

3 years ago

What is -18+-90 i know im just answering it for you

Elanso [62]

Answer:

-18+(-90) = -18-90 = -108

3 0

3 years ago