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antoniya [11.8K]
3 years ago
11

Why is 315 the lcm of 21 and 45?

Mathematics
1 answer:
Maurinko [17]3 years ago
3 0
I hope this helps you

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A firefighter training course is taking place in a high-rise building. The high-rise building where they practice is 48 stories
PIT_PIT [208]

Answer:

29 stories - 49 stories = number of stories they need to go

28 - 49 = 21

the answer is 21

they have 21 more stories to go

4 0
3 years ago
8th grade math, please help.<br> I’ll give you brainliest if you want.<br><br> -Find the volume-
Alecsey [184]

Answer:

340.34

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Convert to a percent.<br><br> A. <br> 53%<br> B. <br> 35%<br> C. <br> 60%<br> D. <br> 30%
adelina 88 [10]

3/5 converted to percentage gives 60%

How do we convert a fraction to a percentage?

First and foremost, the maximum percentage value any number could have is 100% , hence, in order to convert a number or fraction or even  a decimal to percentage, we simply multiply it by 100

3/5 to percent:

In order to convert 3/5 to percentage, we would multiply by 100

3/5=3/5*100

3/5 in percent=300/5

3/5 in percent=60

3/5 in percent =60%

As a result, the correct option is 60%,which is the third option, option C

Find out more about percentage on:brainly.com/question/18488471

#SPJ1

Full question:

Convert 3/5 to a percent.

A.30%

b.35%

c.53%

d.60%

7 0
1 year ago
A consumer group is interested in estimating the proportion of packages of ground beef sold at a particular store that have an a
storchak [24]

Answer:  267.

Step-by-step explanation:

When there is no prior information for the population proportion, then the formula we use to find the sample size to estimate the confidence interval :

n=0.25(\dfrac{z^*}{E})^2 , where z* = Critical z-value and E + amrgin of error.

Let p = proportion of packages of ground beef sold at a particular store that have an actual fat content exceeding the fat content stated on the label.

Since , we have no prior information about p. so we use above formula

with E = 0.06 and critical value for 95% confidence =z* =1.96  [By z-table ] , we get

n=0.25(\dfrac{1.96}{0.06})^2=0.25(32.6666)^2\\\\=(0.25)(1067.111111)\\\\=266.777777778\approx267

Hence, the required sample size is 267.

7 0
3 years ago
How many 3 letter codes are possible using a-j without repeats?
Dennis_Churaev [7]
There are 10 letters in the set {a, b, c, d, e, f, g, h, i, j} which is the pool of letters to choose from when making these three letter codes.

We have 10 choices for slot 1
Then 9 choices for slot 2. This is because we can't reuse the choice for slot 1
Then 8 choices for slot 3

Overall, there are 10*9*8 = 90*8 = 720 different permutations

Answer: 720

Note: you can use the nPr permutation formula with n = 10 and r = 3 to get the same answer
5 0
3 years ago
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