3 years ago

75 is 20% of what number?

Mathematics

1 answer:

katrin [286]3 years ago

8 0

Answer:
37.5
you need to convert 75 divided by 200 which will give you 37.5

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An oblique cylinder has a radius of 10 meters and a volume of 2,500 cubic meters. Use Cavalieri’s Principle to solve for the hei

shusha [124]

The idea of the Cavalieri's Principle states that even if the cylinder is oblique, so long as the planes in the figure are parallel, the equation would still be equal to,
V = Bh = πr²h
Substituting,
2,500 = π(10 m)²h
h = 7.95 m
The answer should be 5 meters.

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3 years ago

These are lines in a plane that are always the same distance apart and never intersect. What are they? *

Pavlova-9 [17]

Answer:

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Step-by-step explanation:

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Hope this helps, thank you :) !!

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3 years ago

18 science club members have birthdays in the summer. This is 20% of the birthdays in the club. How many club members are there?

swat32

18 * 5 = 90
90 represents 100%, because there are 5 20% in 100%

In total there are 90 club members
80% = 71 do not have birthdays in the summer.

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3 years ago

At a rate of 36 miles per hour, it takes Henry 15 minutes to drive from the library to his house. Show how to find the distance

EastWind [94]

This is applying the formula
$distance=rate*time$

We have a slight problem, though, because we are measuring rate in miles per hour, and we are measuring time in minutes. To make this problem solvable, we need to convert to either miles per minute or convert the time to hours. I'm going to convert the 15 minutes into hours:
$15min*\frac{1 hour}{60 min}=\frac{1}{4}hour$

Now that all of the units match, we have:
$distance=36\frac{mi}{hr}*\frac{1}{4}hr$

You can finish from there I'm sure.

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3 years ago