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3 years ago

In 8 years tamika will be 22 how old is she now?

Mathematics

2 answers:

aleksandrvk [35]3 years ago

6 0

Answer:

Step-by-step explanation:

22-8=14

Nataly_w [17]3 years ago

6 0

Answer:

shes 14

Step-by-step explanation:

22-8

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A machine that produces ball bearings has initially been set so that the true average diameter of the bearings it produces is .5

lara [203]

Answer:

7.3% of the bearings produced will not be acceptable

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 0.499, \sigma = 0.002$

Target value of .500 in. A bearing is acceptable if its diameter is within .004 in. of this target value.

So bearing larger than 0.504 in or smaller than 0.496 in are not acceptable.

Larger than 0.504

1 subtracted by the pvalue of Z when X = 0.504.

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{0.504 - 0.494}{0.002}$

$Z = 2.5$

$Z = 2.5$ has a pvalue of 0.9938

1 - 0.9938= 0.0062

Smaller than 0.496

pvalue of Z when X = -1.5

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{0.496 - 0.494}{0.002}$

$Z = -1.5$

$Z = -1.5$ has a pvalue of 0.0668

0.0668 + 0.0062 = 0.073

7.3% of the bearings produced will not be acceptable

4 0

3 years ago

Which of the following statements best describes the relationship of a relation and a function? Select all that apply. A relatio

MariettaO [177]

A relation is a function, if and only if, the x- values do not repeat in a given set.

5 0

3 years ago

Read 2 more answers

If each lap in a pool is 100 meters long, how many laps equal 1 mile? (1ft= 0.3048 meters

Tresset [83]

1 mile=1,609.34 meters
because each lap is equal to 100m it might be 16 laps
16 laps =1600m which is almost equal to 1609.34m
I think there's not a exact number of laps. you can try with your own calculations you'll end up with some decimal remaining.
I hope this will help.

6 0

2 years ago

Megan has a pen for her dog the dimensions of the pen are in meters

Alex73 [517]

So measure the pen in meters

3 0

3 years ago

there are 53 oranges in a box that contains a total of 77 pieces of fruit. how many oranges need to be added so that the box con

Tju [1.3M]

Ok so do 100 divided by 77 to get about 1.3% per fruit. then do 1.3 times 53 to get the current percent of oranges which is about 69% then do 84% minus 69% to get the difference then divide by 1.3 to get about 11.5 oranges so you round to 12 oranges. So 12+53 to get 65 total oranges to equal 84% of the 77 fruit in the box.

6 0

3 years ago