Help ASAPPPPPPPPPPP!!!!!!!!!!!!!!pleaseeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

elena-s [515]3 years ago

8 0

Answer:

# siblings ratio fraction decimal percent

0 3 : 20 3/20 .15 15%
1 1 : 5 1/5 .20 20%
2 3 : 8 3/8 .375 37.5%
3 6 : 25 6/25 0.24 24%
4+ 7 : 200 7/200 0.035 3.5%

Step-by-step explanation:

I'll use row 3 as an example to show you how to do all these.

# siblings ratio fraction decimal percent

3 0.24

To find fraction

put number over 100 and just simplify as much as you can.

24/100 = 12/50 = 6/25

To find ratio

ratios are the same as fractions, but instead of the fraction bar or slash, you have a colon.

this one would look like 6 : 25 as a ratio.

To find decimal

DIVIDE the fraction or ratio (using a calculator if allowed, or by hand otherwise)

6/25 = 0.24

To find percent

take the decimal once you find it, and move the decimal point to the right by 2 digits. That's the percent.

0.24 ==> 24%

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Solve for BC and round your answer to the nearest hundredth

Tasya [4]

You gotta round the be to 100,000

6 0

3 years ago

HELP ME NOW PLEASE NOW ADGAFDKD;LHJ!!!!!! PLEASE AND THANK YOU :)))))

Eddi Din [679]

I got D.

There's a few ways to solve it; I prefer using tables, but there are functions on a TI-84 that'll do it for you too. The logic here is, you have a standard normal distribution which means right away, the mean is 0 and the standard deviation is 1. This means you can use a Z table that helps you calculate the area beneath a normal curve for a range of values. Here, your two Z scores are -1.21 and .84. You might notice that this table doesn't account for negative values, but the cool thing about a normal distribution is that we can assume symmetry, so you can just look for 1.21 and call it good. The actual calculation here is:

1 - Z-score of 1.21 - Z-score .84 ... use the table or calculator

1 - .1131 - .2005 = .6864

Because this table calculates areas to the RIGHT of the mean, you have to play around with it a little to get the bit in the middle that your graph asks for. You subtract from 1 to make sure you're getting the area in the middle and not the area of the tails in this problem.