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3 years ago

Mary covered her kitchen floor with

Mathematics

1 answer:

sineoko [7]3 years ago

6 0

Answer:

l x w / s

Step-by-step explanation:

Floor is covered with 10 tiles

Floor measurement: 6 feet length x 5 feet width

Area covered by floor = 6 x 5 = 30 square feet

Since there are 10 tiles, each tile = 30/10 = 3

Hence in terms of equation

if the length of the tile is l and the width w

If s is used to represent the size of each tile

number of tiles needed is l x w / s

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There are three consecutive even integers. If twice the first integer added to the second is 268,244, find all three integers.

r-ruslan [8.4K]

Answer:

89414,89416,89418

Step-by-step explanation:

Let n bet the positive integer and then 2n is an even integer because multiplying n with 2 makes it an even integer.

Now, 2n+2, 2n+4 are the next integers.

Therefore, three consecutive integers are: 2n, 2n+2, 2n+4.

It is given that twice the first integer added to the second is 268,244 that means:

$2(2n)+(2n+2)=268244$

$4n+2n+2=268244$

$6n=268242$

$n=44707$

Therefore, three consecutive integers are:

2n=89414, 2n+2=89416, 2n+4=89418

8 0

3 years ago

According to the Bohr model, the radius of a hydrogen atom is approximately 5.29 × 10-11 meters.

andrezito [222]

Simplify the expression:
41.9

7 0

4 years ago

Read 2 more answers

4. Tom bought 333 pounds of

Lady_Fox [76]

Tom bought 768 pounds of candy because 333 + 435 = 768

8 0

3 years ago

A spring stretches in relation to the weight hanging from it all cording to the equation Y equals 0.75X +0.25 where X is the wei

Tomtit [17]

What is the question?

3 0

3 years ago

A school has 3400 students. They conduct a random sample of 124 students and find that 38 of them hate the school.

Contact [7]

Answer:

a) We need a sample size of at least 2401.

b) We need a sample size of at least 1936.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

In which

z is the zscore that has a pvalue of .

The margin of error is:

95% confidence level

So , z is the value of Z that has a pvalue of , so .

(a) you are unwilling to predict the proportion value at your school and

We use , which is when we are going to need the largest sample size.

So we need to find We need a sample size of at least 2401.

(b) you use the results from the surveyed school as a guideline.

Now the same calculation, just with . So

We need a sample size of at least 1936.

5 0

3 years ago