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GalinKa [24]
3 years ago
9

A classroom measures 14 meters by 7 meters by 3.5 meters. How many cube meters of air are in the room?

Mathematics
1 answer:
N76 [4]3 years ago
8 0

Answer:

343 cube meters of air

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2 1⁄7 × 3 3⁄4 × 5 1⁄3 = <br> plz help me :,(
chubhunter [2.5K]

Answer:

42 6/7

Step-by-step explanation:

For me what i usually do is i convert the mixed number into a fraction, which for example:

Example and Explanation: Step 1

so since the number 7 is the denominator and the 2 is the mixed number, we can multiply these numbers, 2 x 7 = 14, then we add our numerator which in this case, is one, 14 + 1 = 15, and since the denominator stays the same, our fraction now is 15/7. We do the same for the others:

3 3/4:

3 x 4 = 12 + 3 = 15 = 15/4

5 1/3:

5 x 3 = 15 + 1 = 16 = 16/3

Now that they are all fractions we can finally do the multiplication

Multiplying Fractions: Step 2

Multiplying fractions does not require that the fractions have the same denominator. Instead, the numerators are multiplied with each other and the denominators are multiplied with each other. However, the resulting fraction may not be in lowest terms so it may need to be reduced. So since this is a three step multiplication problem, we will multiply two fractions first.

In this case I chose 15/7 x 15/4. so we just multiply from there, 15 x 15 = 225, and  7 x 4 = 28. So our fraction is 225/28, now we will multiply the other fraction: 225/28 x 16/3 which comes out to 3,600/84. Wow, thats a big number, now its time to..

Reduce: Step 3

This fraction is far too big to be a proper answer, so we will reduce, also known as simplifying.  

Find the Greatest Common Factor (GCF) of 3600 and 84, if it exists, and reduce our fraction by dividing both numerator and denominator by it. GCF = 12,

=3600÷1284÷12=3007

Converting to a mixed number using long division with remainders for 300 ÷ 7.

300÷7=42r6

Therefore:

300/7 = 42 6/7

I am so sorry if i am wrong

3 0
3 years ago
If the perimeter of the rectangle is 30 cm and value of j is 8.
dezoksy [38]
2j +2h =30. That is the equation

2(8) + 2h = 30
16+ 2h =30

Subtract 16 from both sides
2h = 14
H=7
4 0
3 years ago
A graduate student designs a research study. She hopes to show that the results of her experiment are statistically significant.
Mekhanik [1.2K]

Answer:

A small P-value.

Step-by-step explanation:

A small P- value.

A small P- value , P-value indicates that the results are statistically significant.

P value in Statistics helps to perform hypothesis test and it helps to determine the significance of the results.

A small P- value typically (P<0.05) indicates strong evidence against the null hypothesis so, we reject the null hypothesis, on contrary when P- value is large we cannot reject the null hypothesis.  

3 0
3 years ago
HELP PLSSS !!! CAROLINE BOUGHT SNACKS FOR HER TEAM’S PRACTICE. SHE BOUGHT A BAG OF CHIPS FOR $2.39….
Salsk061 [2.6K]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
"the advrage a of 2 numbers c and d is equal to half the sum of c and d " this whole qustion confuses the I am basically suppose
olga_2 [115]

Answer:

\frac{c + d}{2}

Step-by-step explanation:

this is the equation used to find the average of two numbers.

8 0
3 years ago
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