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3 years ago

Whats 7,080,267 in expanded form

Mathematics

2 answers:

Kitty [74]3 years ago

6 0

7,000,000+80,000+200+60+7

garik1379 [7]3 years ago

4 0

7,000,000 + 80,000 + 200 + 60 + 7

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The same couple, what is the probability that if they have three children, two will be boys and one will be a

cricket20 [7]

3/8 would be the correct answer.

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3 years ago

What is the value of 3 in 743275

dusya [7]

The value of 3 would be 3,000.

Why thousands? Well because u have to count from the right, then back, so ones, tens, hundreds, then thousands lands on 3 so hope this helps.

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4 years ago

Evaluate x-2 for x = -3.

Vadim26 [7]

X-2 for x=-3
-3-2=-5, add dem negatives

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3 years ago

There are 96 children in a room.

Olenka [21]

Answer:

7/12

Step-by-step explanation:

Basically to find the boys fraction I subtracted 40 from 96 and got 56. Your answer for the number of boys would be 56/96. I divided 4 from each and got 14/24. lastly I divide by 2 and got 7/12.

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3 years ago

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

4 0

3 years ago

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