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Vanyuwa [196]
2 years ago
13

The heights (in inches) of males in the United States are believed to be Normally distributed with mean LaTeX: \muμ. The average

height of a random sample of twenty-five American adult males is found to be H = 69.72 inches and the standard deviation of the twenty-five heights is found to be s = 4.15. The standard error of H is = 4.15. A 90% confidence interval for ? is?
Mathematics
1 answer:
-BARSIC- [3]2 years ago
6 0
Spread the day leave come on man
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Simplify the following expression.
AlekseyPX

Answer:

The answer is cosx cot²x ⇒ the first answer

Step-by-step explanation:

∵ cot²x = cos²x/sin²x

∵ secx = 1/cosx

∴ cot²x secx - cosx = (cos²x/sin²x)(1/cosx) - cosx

  = (cosx/sin²x) - cosx

Take cosx as a common factor

∴ cosx[(1/sin²x) - 1] ⇒ use L.C.M

∴  cosx[1-sin²x/sin²x]

∵ 1 - sin²x = cos²x

∴ cosx(cos²x/sin²x) = cosx cot²x

6 0
3 years ago
Modeling real life last week you finish level to of a video game and 32 minutes today you finish level 2 in 28 minutes what is t
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Answer:

  -12.5%

Step-by-step explanation:

The percentage change in your time can be computed using ...

  pct change = ((new value)/(old value) -1) × 100%

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The time to finish level 2 decreased by 12.5%.

6 0
3 years ago
HELP PLS ‼️The two lines graphed on the coordinate grid each represent an equation.
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Answer:

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I hope this is what you were asking

8 0
2 years ago
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A single card is selected from a deck. find the probability that it is a queen or a black card.
s2008m [1.1K]
52 cards in a deck. 4 of those are queens. 52/2=26 (total # of black cards), 2 red queens. Total + of cards you could possibly draw as the favored car = 28 out of 52...,

This is where i lose the probability. It's greater than 50%. I hope this helps.
8 0
3 years ago
Tangela bought 12 cans of soda for 5.40 what was the unit rate for each can of soda
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Answer:

Step-by-step explanation:

So 5.40 divided by 12

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2 years ago
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