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spayn [35]
3 years ago
6

What is 30/25 as a percentage?​

Mathematics
2 answers:
just olya [345]3 years ago
8 0

Answer:

120%

Step-by-step explanation:

Just divide the numerator(30) by the denominator(25).

netineya [11]3 years ago
3 0

Answer:

120%

Convert fraction (ratio) 30 / 25 Answer: 120%

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The distribution of heights for adult men in a certain population is approximately normal with mean 70 inches and standard devia
KengaRu [80]

Answer:

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12]

Step-by-step explanation:

I beleive those options corresponds to another question, i will ignore them. We want to know an interval in which the probability that a height falls there is 0.8.

In such interval, the probability that a value is higher than the right end of the interval is (1-0.8)/2 = 0.1

If X is the distribuition of heights, then we want z such that P(X > z) = 0.1. We will take W, the standarization of X, wth distribution N(0,1)

W = \frac{X-\mu}{\sigma} = \frac{X-70}{4}

The values of the cumulative distribution function of W, denoted by \phi , can be found in the attached file. Lets call y = \frac{z-70}{4} . We have

0.1 = P(X > z) = P(\frac{X-70}{4} > \frac{z-70}{4}) = P(W > y) = 1-\phi(y)

Thus

\phi(y) = 1-0.1 = 0.9

by looking at the table, we find that y = 1.28, therefore

\frac{z-70}{4} = 1.28\\z = 1.28*4+70 = 75.12

The other end of the interval is the symmetrical of 75.12 respect to 70, hence it is 70- (75.12-70) = 64.88.

The interval (meassured in Inches) that represent the middle 80% of the heights is [64.88, 75.12] .

Download pdf
8 0
3 years ago
The ratio of red balloons to blue balloons is 4 to 11. There are 133 more blue balloons than red balloons. How many blue balloon
Kay [80]
The ratios of blue balloons to red balloons is 137 red balloons to 144 blue balloons

5 0
3 years ago
I don't know how to solve this. Anything will help!​
tigry1 [53]
Hello :) to solve this you would have to do invert sin (51/55) on your calculator. When you do that you will get 68.013 so I would round that and say that the angle is 68 degrees
4 0
2 years ago
What is 2x= 10<br> what is x
IRISSAK [1]

If 2x=10 then x=5 because 2\cdot5=10.

Hope this helps.

3 0
3 years ago
I neeed help with middle school math
Artist 52 [7]
Multiple different forms in the picture attached - for these problems use Math-way is super easy
First is the exact form

6 0
3 years ago
Read 2 more answers
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