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VARVARA [1.3K]
1 year ago
13

A previous analysis of paper boxes showed that the the standard deviation of their lengths is 9 millimeters. a packer wishes to

find the 98% confidence interval for the average length of a box. how many boxes does he need to measure to be accurate within 3 millimeters?
Mathematics
1 answer:
maksim [4K]1 year ago
7 0
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Pens cost 15 pence each.
ch4aika [34]

Answer:

The amount the school pays is £32.40

Step-by-step explanation:

The cost of each pen = 15 pence

The cost of each ruler = 20 pence

The number of pens bought by the school = 150

The number of rulers bought by the school = 90

The cost reduction (discount) on the items bought = 1/5

Therefore, we have;

The total cost of the pens bought by the school = 150 × 15 = 2250 = £22.50

The total cost of the rulers bought by the school = 90 × 20 = 1800 = £18.00

The total cost of the writing materials (rulers and pens) bought by the school = £22.50 + £18.00 = £40.50

The discount = 1/5 total cost reduction = 1/5×£40.50  = $8.10

The amount the school pays = The total cost of the writing materials - The discount

The amount the school pays = £40.50 - $8.10 =  £32.40

The amount the school pays =  £32.40.

7 0
1 year ago
Given pre-image ABCDE. Which of the transformations resulted in image Point A'?
mihalych1998 [28]
<span>A(x, y) → (x - 3, y + 1)</span>
8 0
1 year ago
A hotel has 56 guests 35 of them are male work out 35 out of 56 as a percentage
Daniel [21]
%62.5 you divide the amount of males with the total amount of guests then you will get 0.625 so you put the comma two places behind and add a percentage.
6 0
1 year ago
Read 2 more answers
A 20-inch diameter bicycle tire rotates 200 times.
fenix001 [56]

Answer: B)1,047 feet

Step-by-step explanation:

Hi, to answer this question, first, we have to calculate the circumference of the tire:

Circumference(C): π x diameter

C = π (20) = 62.83 inches.

Since 1 foot is equal to 12 inches.

62.83 ÷ 12 = 5.23 feet

Finally we have to multiply the result by 200:

5.23 x 200 = 1,047 feet

Feel free to ask for more if needed or if you did not understand something.

8 0
2 years ago
The sides of a square are five to the power of two fifths inches long. What is the area of the square?
Feliz [49]
I believe the correct answer from the choices listed above is the first option. If the  sides of a square are five to the power of two fifths inches long, then the are of the square would be <span>five to the power of four fifths square inches. Hope this answers the question.</span>
3 0
1 year ago
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