2 years ago

Write a ratio, in simplest form and a percent for the shaded area

Mathematics

2 answers:

musickatia [10]2 years ago

4 0

Answer:

do you have an image

Step-by-step explanation:

mars1129 [50]2 years ago

3 0

Answer:

drhjrdrhj

Step-by-step explanation:

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Scores from an exam are normally distributed with a mean of 85 and a standard deviation of 5. Suppose 188 students take the exam

charle [14.2K]

The mean is $\mu=85$ and standard deviation is $\sigma=5$ . Then the variable $X\sim N(85,5)$ .

Use substitution $Z=\dfrac{X-\mu}{\sigma}=\dfrac{X-85}{5}$ , then the variable $Z\sim N(0,1)$ .

The probability $Pr(X>80)$ can be calculated in the following way:

for X=80, $Z=\dfrac{80-85}{5} =-1$ and $Pr(X>80)=Pr(Z>-1)$ . From the diagram $Pr(Z>-1)=0.34+0.34+0.135+0.025=0.84$ .

Conclusion: if 188 students take the exam, then 188·0.84=157.92 (157) would receive a score above 80

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3 years ago

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Answer:

1/9

Step-by-step explanation:

120/1080 can be simplified to 1/9

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2 years ago

Express 45 minutes as a fraction of 1 hour

Pepsi [2]

Answer:

$\frac{3}{4}$

Step-by-step explanation:

There are 60 minutes in 1 hour

To express as a fraction

$\frac{45}{60}$

Divide numerator/denominator by 15

$\frac{45}{60}$ = $\frac{3}{4}$

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3 years ago

Kara and her friends have $17 to spend at a pizza parlor.they would like to buy large pizza which costs $12 and then add as many

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Answer:kara Had $17-$12. Pizza cost =leave u with $5 x.50=10topping

Step-by-step explanation:

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2 years ago

What is the expanded form 845,212

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$845.212= 8*100.000+4*10.000+5*1.000+2*100+1*10+2$

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