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Advocard [28]
3 years ago
10

assume that the class has 80 students and that the examination period is 95 minutes in length. How many students do you expect w

ill be unable to complete the exam in the allotted time
Mathematics
1 answer:
Kazeer [188]3 years ago
5 0

Answer:

Number of students successful= 75

Number of students not able to complete the exam in the allotted time= 5

Step-by-step explanation:

In this question the main part is missing .The given statement is the sub part of the problem .

Suppose the main part is

<u><em>The time needed to complete a final examination in a particular college course is normally distributed with a mean of 80 minutes and a standard deviation of 10 minutes. </em></u>

<u><em></em></u>

If the main part was given like this only then we could do the following calculations.

So from above the

Population mean = μ= 80

Population Standard deviation =σ= 10 mins

Sample mean = x`= 95

Sample size= n= 80

Now first we calculate the z= score

z= x`-μ/σ

z= 95-80/10= 1.5

From the z- table we find the P (z< 1.5)= 0.9332

Now we have to find the number of students who need to complete the exam in the allotted time

Number of students successful= np= 80 * 0.9332= 74.656= 75

Number of students not able to complete the exam in the allotted time= 80-75= 5

<u><em>These answers are based on the main part supposed to be as added just to explain how it will be calculated.</em></u>

<u><em>There may be any discrepancy with the original question.</em></u>

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Refer to image below
il63 [147K]

Answer:

A ≈ 40°

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality<u> </u>

<u>Trigonometry</u>

  • [Right Triangles Only] SOHCAHTOA  
  • [Right Triangles Only] sinθ = opposite over hypotenuse<u> </u>

Step-by-step explanation:

<u>Step 1: Identify</u>

Angle θ = A

Opposite Leg = 27

Hypotenuse = 42

<u>Step 2: Solve for </u><em><u>A</u></em>

  1. Substitute [sine]:                                                                                             sinA = 27/42
  2. Simplify:                                                                                                           sinA = 9/14
  3. Trig inverse:                                                                                                    A = sin⁻¹(9/14)
  4. Evaluate:                                                                                                         A = 40.0052°
  5. Round:                                                                                                             A ≈ 40°
5 0
3 years ago
A squere is a perimeter of 16.4 inches. what is the area
Stels [109]

Answer:

16.81

Step-by-step explanation:

P = 4a.

then the length of a side is 16.4 /4 = 4.1.

A = a * a = 4.1 * 4.1 = 16.81

6 0
2 years ago
Read 2 more answers
Clarence saved 19% of the money he earned if he earned 90$ how much did Clarence save
Andrews [41]

Answer: $17.1

Step-by-step explanation:

19% = 19/100 = 0.19

Convert to fraction

=19% of $90

=19/100 × 90

=0.19 × 90

=17.1

I hope this helps.

5 0
3 years ago
Read 2 more answers
X- Y-
soldier1979 [14.2K]

Each time x goes up by 1, y also goes up by 1 as well.

slope = rise/run = 1/1 = 1

Or we can use the slope formula to get

m = (y2-y1)/(x2-x1) = (3-2)/(2-1) = 1/1 = 1

I used the first two rows as the points to plug into the slope formula.

You can pick any two rows you want and you'll get the same slope value.

--------------------------------------

Because we get the same result of 1 each time, this means the rate of change is <u>constant</u> and this function is <u>linear</u>. Plotting all four points will show a single straight line goes through all of them. See diagram below.

7 0
3 years ago
Mrs. Johnson need 4 blue paper circles for each student in her class she can cut 6 of these circles from each piece a blue paper
Sav [38]
Total circles needed = 32 × 4 = 128

papers needed to have 128 circles = 128 / 6 = 21.3 rounded up 22 because paper is whole number.
5 0
3 years ago
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