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Oxana [17]
3 years ago
14

21 students in michael's classroom are wearing jeans. there are 25 students in his class.michael says that 80% of his class is w

earing jeans.is michael correct ? explain your reasoning.
Mathematics
2 answers:
jek_recluse [69]3 years ago
5 0
No, Michael would not be correct. 84% of his class would be wearing jeans. I divided 21 by 25, which came out to be .84.
grigory [225]3 years ago
3 0

There are a total of 25 students in Michael's classroom. Given 21 students are wearing jeans.

Michael said that 80% of his class is wearing jeans.

So we can get the number of students wearing jeans by finding 80% of 25 students.

80% of 25 = 25 × 80/100 = 2000/100 = 20

So 80% of 25 students is 20 students.

But given 21 students are wearing jeans.

So, Michael is not correct as 21 students are not 80% of his classroom.

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Paha777 [63]

Answer:

Gold : total

35 : 103

Step-by-step explanation:

USA gold = 35

Total usa = 103

Gold : total

35 : 103

4 0
3 years ago
Here is my question please answer and give a good explanation: Which expression cannot be used to calculate the total amount pai
Ierofanga [76]
I'm pretty sure the answer is D. because I don't think anyone would want to take their total meal cost and then multiply it by their tip to make it even larger. You would just add the tip to the meal cost.
6 0
3 years ago
A fountain is made up of two semicircles and a quarter circle. Find the perimeter of the fountain. Round answers to nearest tent
AlexFokin [52]

Answer:

39.275

Step-by-step explanation:

the diameter of the semicircle is 10

A semicircle is half a circle, and a quarter circle is 1/4 of a circle.

Perimeter of a semicircle is ¶d/2

= 3.142 x 10/2 = 3.142 x 5 = 15.71

For 2 semicircles that will be 15.71 x 2 = 31.42

For the quarter circle, perimeter is ¶d/4 = 3.142 x 10/4 = 3.142 x 2.5 = 7.855

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5 0
4 years ago
Find out the Range coefficient of the range
Alex777 [14]

Answer:

0.4494

Step-by-step explanation:

Given :

marks number of students

20-29 8

30-39 12

40-49 20

50-59 7

60-69 3​

The range Coefficient is obtained thus :

Range Coefficient = (Xm - Xl) / (Xm + Xl)

Where ;

Xm = Mid value of highest class = (60+69)/2 = 64.5

Xl = Mid value of lowest class = (20+29)/2 = 24.5

Range Coefficient = (64.5 - 24.5) / (64.5 + 24.5)

Range Coefficient = 40 / 89 = 0.4494

7 0
3 years ago
One weekend, Paola started reading a book for school. She read 35 pages of the book on Saturday. On Sunday she read 15 pages an
Sidana [21]
35 + 15 x 4 = 60. Paola read 60 pages in total.
6 0
3 years ago
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