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Over [174]
3 years ago
13

Alana can complete 100 math facts in 5 minutes. How long does it take her to complete 1 math fact?

Mathematics
1 answer:
Inga [223]3 years ago
3 0

Answer:

3 seconds

Step-by-step explanation:

Convert minutes to seconds: 5*60=300 seconds. 100 math facts in 300 seconds. 100/300=3. She solves a math question every 3 seconds (holy cr.ap that's fast)

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In the United States, the mean and standard deviation of adult men's heights are 70 inches (5 feet 10 inches) and 4 inches, resp
Artyom0805 [142]

Answer:

P(X>72)=P(\frac{X-\mu}{\sigma}>\frac{72-\mu}{\sigma})=P(Z>\frac{72-70}{4})=P(z>0.5)

And we can find this probability using the complement rule and the normal standard table:

P(z>0.5)=1-P(z

And the best solution would be:

c. 0.3085

Step-by-step explanation:

For this case we can convert all the values to inches in order to standardize the solution:

5ft * \frac{12 in}{1ft}= 60 in

6ft * \frac{12 in}{1ft}= 72 in

Let X the random variable that represent the heights of US mens, and for this case we know the distribution for X is given by:

X \sim N(70,4)  

Where \mu=70 and \sigma=4

We are interested on this probability

P(X>72)

We can use the z score formula given by:

z=\frac{x-\mu}{\sigma}

Using this formula we got:

P(X>72)=P(\frac{X-\mu}{\sigma}>\frac{72-\mu}{\sigma})=P(Z>\frac{72-70}{4})=P(z>0.5)

And we can find this probability using the complement rule and the normal standard table:

P(z>0.5)=1-P(z

And the best solution would be:

c. 0.3085

5 0
3 years ago
Elijah estimates that 80% of the email he receives could be classified as junk. To predict how many junk mail messages he might
yuradex [85]
I believe the answer is c sorry if I’m wrong
4 0
3 years ago
Read 2 more answers
-3x + 7 = 1<br> what dose x represent
olchik [2.2K]

Answer:

the answer is x=3

Step-by-step explanation:

-3x=1-7

-3x=-6

-x=-6+3

-x=-3

x=3

3 0
3 years ago
Test worth 75 points ; test score of 96%
vfiekz [6]
Presuming the question is "How many points did he miss", you would find the solution by multiplying the amount of possible points by the test score as a fraction. 96% is the fraction \frac{96}{100}. Therefore, you get the equation 75*\frac{96}{100}. This is equal to 72, so he missed 3 points, or 75-72 points. 

He missed 3 points. 
6 0
4 years ago
Read 2 more answers
PLEASE HELP I WILL MARK BRAINLIEST!!!
yawa3891 [41]

Answer:

5 lines we can draw using 2 points

5 0
2 years ago
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