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netineya [11]
2 years ago
7

They can solve and show everything done please

Mathematics
1 answer:
Serhud [2]2 years ago
6 0

Answer:

4/15 is the answer my guy

Step-by-step explanation:

5/3 x 4/25= 20/75 simplified is 4/15

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The heights of students in a class are normally distributed with mean 55 inches and standard deviation 5 inches. Use the Empiric
maks197457 [2]

Answer:  c)[50,60]

Step-by-step explanation:

The Empirical rule says that , About 68% of the population lies with the one standard deviation from the mean (For normally distribution).

We are given that , The heights of students in a class are normally distributed with mean 55 inches and standard deviation 5 inches.

Then by Empirical rule, about 68% of the heights of students lies between one standard deviation from mean.

i.e. about 68% of the heights of students lies between \text{Mean}\pm\text{Standard deviation}

i.e. about 68% of the heights of students lies between 55\pm5

Here, 55\pm5=(55-5, 55+5)=(50,60)

i.e.  The required interval that contains the middle 68% of the heights. = [50,60]

Hence, the correct answer is c) (50,60)

4 0
3 years ago
Need help with this please
tester [92]

To find the area of the shaded region, we must first find the percentage that is shaded.

We understand that 140 degrees out of 360 degrees are unshaded, thus there are 220 degrees shaded.

Thus the percentage is equal to \frac{220}{360}

Area = \frac{220}{360} *\pi* 18^{2} = 198\pi square yards

Hope that helps!

3 0
2 years ago
Twenty more than one- fifth of a number is 120. Find the number.
Goshia [24]

Answer: x=500

Step-by-step explanation:

Twenty more (+20) of a fifth of a number (.2x) is equal to 120. So, the equation would be .2x+20=120. To isolate x, subtract 20 from each side. So now we have .2x=100. To get rid of the .2 or 1/5, we have to multiply everything by the reciprocal of 1/5, or 5. So, 100(5)=.2x(5), or simplified, x=500. Hope this helps!

7 0
3 years ago
Read 2 more answers
A student inherited $6,100 and deposits x dollars in American Savings. Write amp algebraic expression that represents the amount
VMariaS [17]

Answer1=1=4 quick mafffths

Step-by-step explanation:

you thought you were gonna cheat

4 0
3 years ago
Pls help for exam<br><br> Find the difference <br><br> 80-26
stellarik [79]
54 is the answer, you could you use a calculator also
7 0
3 years ago
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