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Wewaii [24]
3 years ago
11

Henry would receive $8 per hour, His total earnings amount was $1,920. How many hours did henry work for?

Mathematics
1 answer:
enot [183]3 years ago
6 0

Answer: 240

Step-by-step explanation: 1920/8

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Suppose a normally distributed set of data with 4800 observations has a mean of 195 and a standard deviation of 12. Use the 68-9
Artemon [7]

Answer:

The number of observations in the data set expected to be below a value of 231 is of 4793.

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 195

Standard deviation = 12

The normal distribution is symmetric, which means that 50% of the observations are above the mean and 50% are below.

Proportion of observations below 231:

231 = 195 + 3*12

So 231 is three standard deviations above the mean.

Of the 50% of observations below the mean, all are below 231.

Of the 50% of observations above the mean, 99.7% are between the mean of 195 and three standard deviations above the mean(231).

So, the proportion of observations below 231 is:

P = 0.5*1 + 0.5*0.997 = 0.9985

Out of 4800:

0.9985*4800 = 4793

The number of observations in the data set expected to be below a value of 231 is of 4793.

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2 years ago
. The dot plot shows the number of hours students spent last week on social networking sites. Which is NOT an inference that can
Orlov [11]
B. Females typically spend less time than males on the sites
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2 years ago
A carpenter needs to make 60 dowels.Each dowel must be 6 inches long.The wood from which the carpenter will cut the dowels comes
Mekhanik [1.2K]

Answer: 8

<u>Step-by-step explanation:</u>

60 dowels - each 6 inches (1/2 foot) in length = 30 feet of wood

30 feet of wood ÷ 4 foot boards = 7.5 boards

Since he can't buy half of a board, you must round up to 8 boards.

6 0
3 years ago
Angelina is a sales representative for an appliance distributor. She needs to make at least $5000 in weekly sales of a particula
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5000 divided by 250 equals 20
7 0
3 years ago
Read 2 more answers
Help how much does Sophie weigh
Artyom0805 [142]

Answer:

45

Step-by-step explanation:

You take 181-119=62 then 119-74=45 then the last one was 74, to check you add them all together and you should get 181, since sofia was the smallest she is 45lbs    

3 0
2 years ago
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