Answer:
1. Square, 10in x 8in, 160in^2
2. Each surface has an area of 80in^2
Step-by-step explanation:
1. Rectangle is the shape of each cut surface which is 10in by 8 in. Since the block was already painted with glitter, she needs to paint both sides of the cut surface only, 2*8in * 10in = 160in^2.
2. Each cut will have a surface area of 10in * 8in = 80in^2
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Answer:
And we can find this probability with this difference:
And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the waiting time of a population, and for this case we know the distribution for X is given by:
Where
and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability with this difference:
And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.
Answer:
you profit is 22 you have to divide $209 by $9.50
The discount rate is 20%.
Step-by-step explanation:
Given,
Original price of lawnmower = $300
Sale price of lawnmower = $240
Amount of discount = Original - Sale = 300 - 240 = $60
Rate of discount = ![\frac{Amount\ of\ discount}{Original\ price}*100](https://tex.z-dn.net/?f=%5Cfrac%7BAmount%5C%20of%5C%20discount%7D%7BOriginal%5C%20price%7D%2A100)
Rate of discount = ![\frac{60}{300}*100](https://tex.z-dn.net/?f=%5Cfrac%7B60%7D%7B300%7D%2A100)
Rate of discount = ![\frac{6000}{300}](https://tex.z-dn.net/?f=%5Cfrac%7B6000%7D%7B300%7D)
Rate of discount = 20%
The discount rate is 20%.
Keywords: percentage, subtraction
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