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maw [93]
3 years ago
15

Omar practiced the drums for 153 hours in 18 days. He practiced the same amount of time each day. How much time did Omar practic

e the drums in one day?
Mathematics
1 answer:
BARSIC [14]3 years ago
5 0

Answer:

8 hours and 30 minutes

Step-by-step explanation:

If you divide the hours by the number of days you will get your answer for the average amount of time spent each day. So, 153 hours divided by 18 days is 8.5. 8.5 can also be converted into 8 hours and 30 minutes and .5 is half of a number and 30 minutes is half of an hour. Therefore, your final answer is 8 hours and 30 minutes. Hope this helps! :)

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A company that produces an expensive stereo component is considering offering a warranty on the component. Suppose the populatio
Llana [10]

Answer:

Warranty of 66 months.

Step-by-step explanation:

Problems of normally distributed samples are 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 = 84, \sigma = 9

If the company wants no more than 2% of the components to wear out before they reach the warranty date, what number of months should be used for the warranty?

Only the lowest 2% will be replaced, so the warranty is the value of X when Z has a pvalue of 0.02. So it is X when Z = -2.055.

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

-2.055 = \frac{X - 84}{9}

X - 84 = -2.055*9

X = 65.5

Warranty of 66 months.

5 0
3 years ago
For example let n be the number of components of a certain type brought into a repair shop
Masteriza [31]
Is there more to this question?
3 0
4 years ago
if you were to place 2500 in a savings account that pays 5% interest compounded continuously, how much money will you have after
Vesnalui [34]
The formula is
A=p e^rt
A future value?
P present value 2500
E constant
R interest rate 0.05
T time 10 years
A=2,500×e^(0.05×10)
A=4,121.80
6 0
3 years ago
The diagram shows a logo made from 3 circles. Each circle has a centre 0. daisy says exactly 1/3 of the circle is shaded. is dai
marusya05 [52]

Daisy is not correct. The shaded part is 3/50 that of the whole circle.

<h3>Is Daisy correct?</h3>

In order to determine if Daisy is correct, the area of the circle and the area of the shaded part has to be determined.

Area of the circle = = πr²

Where :

π = pi = 22/7

r = radius = 4 + 3 + 3 = 10

10²π = 100π

Area of the shaded part = 3²π = 9π

Ratio of the areas = 9π / 100π

To learn more about the area of a circle, please check: brainly.com/question/14351152

#SPJ1

3 0
2 years ago
Mark is playing an online puzzle game. He has 40 points and earns 2 points
cupoosta [38]

the answer is A because if it needs to be over 60 the last two don't make sense and since for every question he makes 2 points how ever many points he makes is x and he need to multiply that by 2.

5 0
3 years ago
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