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jeka94
3 years ago
15

A teacher places 55 books onto shelves. Each shelf holds 9 books. How many shelfes does the teacher fill?

Mathematics
2 answers:
marissa [1.9K]3 years ago
7 0

Since each shelf holds 9 books and the teacher has 55, you'll need to divide 55 ÷ 9 to find the number of shelves used. After dividing, you'll get 6.11. Round up the 6.11 to 7 since the teacher is using 6 shelves and a part of the seventh one.

The teacher fills 7 shelves with 55 books.


Umnica [9.8K]3 years ago
5 0

your answer is 495

55 times 9 = 495

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Assume that the probability of a defective computer component is 0.02. Components arerandomly selected. Find the probability tha
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Answer:

0.0177 = 1.77% probability that the first defect is caused by the seventh component tested.

The expected number of components tested before a defective component is found is 50, with a variance of 0.0208.

Step-by-step explanation:

Assume that the probability of a defective computer component is 0.02. Components are randomly selected. Find the probability that the first defect is caused by the seventh component tested.

First six not defective, each with 0.98 probability.

7th defective, with 0.02 probability. So

p = (0.98)^6*0.02 = 0.0177

0.0177 = 1.77% probability that the first defect is caused by the seventh component tested.

Find the expected number and variance of the number of components tested before a defective component is found.

Inverse binomial distribution, with p = 0.02

Expected number before 1 defective(n = 1). So

E = \frac{n}{p} = \frac{1}{0.02} = 50

Variance is:

V = \frac{np}{(1-p)^2} = \frac{0.02}{(1-0.02)^2} = 0.0208

The expected number of components tested before a defective component is found is 50, with a variance of 0.0208.

5 0
2 years ago
How can you 24 with the numbers 6,6,2,1
Andreas93 [3]

Add 6 + 6 = 12

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2 years ago
If s store is selling boxes of pudding at 3 for $0.99,how much would 12 boxes cost
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Answer:

The cost price of 12 boxes of pudding is $3.96

Step-by-step explanation:

Given as :

The quantity of pudding boxes = 3

The cost price for 3 boxes = $0.99

Again ,

The quantity of pudding boxes = 12

Let The cost price for 12 boxes = $x

Now, According to question

<u>Using Unitary method</u>

∵ The cost price of 3 boxes of pudding = $0.99

or,The cost price of 1 boxes of pudding = \dfrac{0.99}{3} = $0.33

∴The cost price of 12 boxes of pudding =$0.33 × 12

I.e x =$3.96

So,The cost price of 12 boxes of pudding = x =$3.96

Hence,The cost price of 12 boxes of pudding is $3.96 Answer

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3 0
3 years ago
David bought a computer that was 20%
maksim [4K]

Answer:

<em>The total price David paid for the computer is $933.12</em>

<em />

Step-by-step explanation:

The cost of the computer will be $1,080 with 20% off and 8% sales tax.


20% of 1080 is 1080(0.20)=216 this means 216 is 20% of 1080, so with the discount the price will be 1080-216=$864

Now we have to find 8% of 864.

864(0.08)=$69.12

So the total price will be 864+69.12= $933.12

6 0
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