All categories

2 years ago

#7 I have 30 people in my class including my teacher and class helper please help and explain

Mathematics

2 answers:

kow [346]2 years ago

4 0

You will have 28 kids because your teacher // and class helper.

koban [17]2 years ago

3 0

You will have 28 students that is the answer

You might be interested in

What is the area of a circle with a radius of 5 units?

baherus [9]

A=pi(c/2)^4=pi^2/c^216=(5pi)^2/8=25pi^2/8

5 0

2 years ago

Read 2 more answers

Two companies rent boats by the hour. The total cost, in dollars, c, depends on the number of hours, h.

Maurinko [17]

Answer:

A(35)

B(35_20=15

Step-by-step explanation:

same as all above

3 0

2 years ago

Does anyone understand this.

Elodia [21]

Its C. The point is at 3 and goes down, therefore C.

8 0

2 years ago

Read 2 more answers

Please help on question 12 or 13 as soon as possible

Anna007 [38]

Answer:

to know the summation of angles: (n-2)*180

here (n) represent numbers of sides

12)we have 5 sides (n=5)

(5-2)*180=540

x=540-(105+135+92+87)=121

13)we have 8 sides (n=8)

(8-2)*180=1080

x=1080-(116+158+141+124+136+132+129)=144

I hope it will help

3 0

2 years ago

In order to estimate the average time spent on the computer terminals per student at a local university, data were collected fro

VladimirAG [237]

Answer:

Margin of error for a 95% of confidence intervals is 0.261

Step-by-step explanation:

Step1:-

Sample n = 81 business students over a one-week period.

Given the population standard deviation is 1.2 hours

Confidence level of significance = 0.95

Zₐ = 1.96

Margin of error (M.E) = $\frac{Z_{\alpha }S.D }{\sqrt{n} }$

Given n=81 , σ =1.2 and Zₐ = 1.96

Step2:-

 $Margin of error (M.E) = \frac{Z_{\alpha }S.D }{\sqrt{n} }$ 

 $Margin of error (M.E) = \frac{1.96(1.2) }{\sqrt{81} }$ 

On calculating , we get

Margin of error = 0.261

Conclusion:-

Margin of error for a 95% of confidence intervals is 0.261

4 0

3 years ago