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Mama L [17]
3 years ago
10

How many 3-digit number can you write with only 4 and 7?

Mathematics
1 answer:
Jlenok [28]3 years ago
7 0

Answer:

8 numbers

Step-by-step explanation:

447

477

474

774

744

747

777

444

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3 sponges cost $3.90. What is the unit price?
Leokris [45]

Answer:

To find the unit price, we divide the total cost by the number of items.

$3.90 ÷ 3 = $1.30

That means the unit price is $1.30 for each sponge.

7 0
3 years ago
Read 2 more answers
Out of area, surface area, and volume; what is the best way to measure a classroom?
Misha Larkins [42]

Answer: I would say area, because area is the amount of space inside a shape.

Step-by-step explanation:

7 0
3 years ago
THIS IS A MULTIPLE CHOICE QUESTION!
Svetlanka [38]

Answer:

The correct answer is A. $385.

Step-by-step explanation:

Since Corey, Billy, and Shea own a house repair and update business, and the number of hours that each person spent painting and doing repair work on the same house is listed below.

• Corey: 4.25 hours

• Billy: 7.75 hours

• Shea: 10.5 hours

And since they earned a total of $ 1,100 for the job and put 25% of the money earned in an account for future expenses, to determine how much money Shea received if they divided the money proportionally based on the number of hours each worked is owed perform the following calculation:

1100 x 0.75 = 825

10.5 + 7.75 + 4.25 = 22.5

22.5 = 100

10.5 = X

10.5 x 100 / 22.5 = X

1050 / 22.5 = X

46.666 = X

825 x 0.4666 = X

384.99 = X

Therefore, Shea received $385.

8 0
3 years ago
Coco needs 150mg of a medication that comes in tablets labelled 100mg each. How many tablets will you give her?
shtirl [24]

Answer:

1.5

Step-by-step explanation:

If 1 tablet is 100mg, and you need 150mg, we set up this equation:

Let x be the number of tablets Coco needs.

x = 150/100

x = 1.5

Therefore, you need 1.5 tablets for the medication.

7 0
3 years ago
Consider the following binomial experiment:
Sedbober [7]

Answer:

0.624

Step-by-step explanation:

Given that:

Number of copiers with the company = 4

It is a binomial experiment.

Probability that on a given day, one copier will break down = \frac{23}{50}

p = \frac{23}{50} = 0.46

q = 1-p = 1-\frac{23}{50}= \frac{27}{50} = 0.54

<em>Formula for Binomial probability: </em>

P(x=r) = _{n}C_{r}p^rq^{n-r}

We have to find P(x >= 2)

P(x >= 2) = P(X=2)+P(X=3)+P(X=4)

P(x=2) = _{4}C_{2}0.46^2\times 0.54^{2} = 0.37\\P(x=3) = _{4}C_{3}0.46^3\times 0.54 = 0.21\\P(x=4) = _{4}C_{4}0.46^4\times 0.54^{0} = 0.044

P(x >= 2) = 0.37 + 0.21 + 0.044 = \bold{0.624}

4 0
3 years ago
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