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jekas [21]
2 years ago
7

When Micaela runs the 400 meter dash, her finishing times are normally distributed with a mean of 81 seconds and a standard devi

ation of 1.5 seconds. What percentage of races will her finishing time be faster than 79.5 seconds, to the nearest tenth
Mathematics
1 answer:
Dennis_Churaev [7]2 years ago
6 0

Answer:

Step-by-step explanation:

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If 3lbs costs 4.00$ how much will 2 lbs cost
harkovskaia [24]

Answer:

1.5

Step-by-step explanation:

if you do 3 divided by 4 then you get 0.75 then you have to do 0.75 times 2 and you get 1.5 dollars for 2 pounds

3 0
3 years ago
Read 2 more answers
The weights of college football players are normally distributed with a mean of 200 pounds and a standard deviation of 50 pounds
belka [17]

Answer:

P(170

And we can find this probability with this difference:

P(-0.6

Step-by-step explanation:

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

X \sim N(200,50)  

Where \mu=200 and \sigma=50

We want to find the following probability:

P(170

And we can use the z score formula given by:

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

And using this formula we got:

P(170

And we can find this probability with this difference:

P(-0.6

8 0
3 years ago
PLEASE HELPPPPP ASAP
saul85 [17]

Answer:

it's the last one, the function is decreasing from x=-3 to x=-1

5 0
3 years ago
The difference of a number and 6 is equal to 46<br> algbreic expression
azamat

Answer:

23

Step-by-step explanation:

3 0
3 years ago
The Pine Apple Store found that 18% of their weekly customers would purchase a new R-phone before leaving the store. If this was
Ahat [919]

Answer:

350 customers

Step-by-step explanation:

Since this is a ratio question and we only have variable that we need to solve (total people that entered last week), Then we can use the Rule of Three to solve this problem. We do this by multiplying the diagonal values of the following model and dividing by the third value in order to find the variable, like so...

18% of customers  <====>  63 customers

100% of customers  <====>  x customers

(100 * 63) / 18 = x

6,300 / 18 = x

350 = x

Finally, we can see that a total of 350 customers entered the store last week.

4 0
3 years ago
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