1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sergio [31]
3 years ago
5

A total of 150 students have taken an Algebra 2 final exam. The scores are normally distributed with a mean of 71% and standard

deviation of 6%. How many students would you expect have scored between 65% and 77%?
Mathematics
1 answer:
WARRIOR [948]3 years ago
3 0

Answer:

102 students

Step-by-step explanation:

Note that 65% and 71% are both 1 standard deviation from the mean (71%).  According to the empirical rule, 68% of scores lie within 1 std. dev. of the mean.

68% of 150 students would be 0.68(150 students) = 102 students

You might be interested in
Convert solar days into minutes​
Pepsi [2]

Answer:

1 Solar day = 86,400 seconds (SI Base Unit)

1 day = 1,440 minutes

Step-by-step explanation:

If need anymore help just ask I'm not really good at explaining but I'll try just comment haha ☺️

6 0
2 years ago
The equation P= 21 + 2w models the perimeter, P, of a rectangle with a length of / units and a width of w units.
natima [27]

Answer:

width = 10 units and length = 20 units

Step-by-step explanation:

Let the width be w

so Length will be 2w

using the rectangle formula:

\sf Perimeter \ of \ rectangle= 2L + 2W

\sf 60= 2(2w) + 2w

\sf 60= 4w + 2w

\sf 60= 6w

\sf w = 10 \ units

Find length:

\sf length = 2w

\sf length = 2(10)

\sf length = 20 \ units

5 0
2 years ago
Read 2 more answers
I need the answer. (will give brainliest)
MatroZZZ [7]

Answer:

6

Step-by-step explanation:

We can use ratios to solve

15 ft            18ft

---------- = -----------

5ft               x

Using cross products

15x = 5*18

15x = 90

Divide by 15

15x/15 = 90/15

x =6

3 0
3 years ago
Read 2 more answers
Is the underlined verb in the sentence regular or irregular?  We arrived early to our football game last night.   A. irregular  
lapo4ka [179]
Regular verb in that sentence
6 0
3 years ago
Read 2 more answers
24=x^2-4x+3 Rewrite the equation by completing the square.
DiKsa [7]

Answer:Let's solve your equation step-by-step.

24=x2−4x+3

Step 1: Subtract x^2-4x+3 from both sides.

24−(x2−4x+3)=x2−4x+3−(x2−4x+3)

−x2+4x+21=0

Step 2: Factor left side of equation.

(−x−3)(x−7)=0

Step 3: Set factors equal to 0.

−x−3=0 or x−7=0

x=−3 or x=7

Answer:

x=−3 or x=7

Step-by-step explanation:

5 0
2 years ago
Other questions:
  • How many pounds are in 1 kilogram
    7·2 answers
  • Courtney works at the local shoe store and receives $150 a week plus 3% of all sales over $1000. This week her sales were $3200.
    13·1 answer
  • The expected number of typographical errors on any page of a certain magazine is 0.2. What is the probability that a certain pag
    5·1 answer
  • 11.<br>The domain of f(x) is [4, 5, 6]. If f(x) = 3x + 2, what is the range?​
    7·1 answer
  • Mina had 10 pens .She gave 3 pens to her sister . What fraction of pens was<br> given?
    13·1 answer
  • Pls help me do you know the answer let me know
    8·2 answers
  • Solve the equation. 8(x + 6) = 43 What is the value of x?​
    6·2 answers
  • Can an acute and obtuse angle be supplementary? Draw a figure showing supplementary angles? ​
    14·1 answer
  • Valuate 2y when y =<br>​
    7·1 answer
  • Fred buys flags from a manufacturer for f dollars
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!