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
Effectus [21]
2 years ago
7

A​ student's course grade is based on one midterm that counts as ​% of his final​ grade, one class project that counts as ​% of

his final​ grade, a set of homework assignments that counts as ​% of his final​ grade, and a final exam that counts as ​% of his final grade. His midterm score is ​, his project score is ​, his homework score is ​, and his final exam score is . What is his overall final​ score? What letter grade did he earn​ (A, B,​ C, D, or​ F)? Assume that a mean of 90 or above is an​ A, a mean of at least 80 but less than 90 is a​ B, and so on.
Mathematics
1 answer:
Andrei [34K]2 years ago
8 0

Answer:

The overall score is 75.6

Letter grade is C

Step-by-step explanation:

The question has missing details (See comment section for complete question).

From the complete question, we have:

<u>Proportion:</u>

Midterm = 15\%

Project = 25\%

Assignment = 40\%

Exam = 20\%

Scores

Midterm = 66

Project = 90

Assignment = 75

Exam = 66

Solving (a): The overall score

To do this, we simply calculate the mean of the given data.

The mean is calculated by multiplying each proportion by the scores..

So, we have:

Overall = 15\% * 66 + 25\% * 90 + 40\% * 75 + 20\% * 66

Overall = 9.9 + 22.5 + 30 + 13.2

Overall = 75.6

Solving (b): The letter grade

From the question, we have:

A: Mean \ge 90

B: 80 \le Mean < 90

C: 70 \le Mean < 80

The overall score falls in the following category:

C: 70 \le Mean < 80

Because:

70 \le 75.6 < 80

<em>Hence, the letter grade is C</em>

You might be interested in
What is the volume of a cylinder with base radius 3 and height 8? Either enter an exact answer in terms of \piπpi or use 3.14, f
sergiy2304 [10]
First find the area of the base, and multiply that by the height. That's the answer.

Area of the base: pi * 3*3 = 3.14*9 = 28.26
Volume of the cylinder: 28.26*8 = 226.08 cubic units
4 0
3 years ago
Read 2 more answers
A square number and a multiple of 3 have a total of 90 what r the 2 numbers
Alecsey [184]

Hello,

Let's x² the square number

and 3*y the multiple of 3.

x^2+3y=90\\\\\boxed{y=-\dfrac{1}{3} x^2+30}\\\\

2 solutions : for (x,y) as integers : (-6,18) and (6,18)

but one solution for (x²,3y) as integers :<u> (36,54) </u>

7 0
3 years ago
44cm is rounded to nearest whole cm. Write down the maximum possible length it could have been.
sesenic [268]

Answer:

44.49 repeated

Step-by-step explanation:

Sorry for the wait

8 0
3 years ago
Which statements about the relationship between the two triangles below are true? Check all that apply,
leva [86]

Answer:

I don't know, because i really don't know

3 0
3 years ago
(1 point) A random sample of 600 movie goers in Flagstaff found 252 movie goers who had bought popcorn on their last visit. Find
garik1379 [7]

<u>Answer-</u>

A 95% confidence interval for the true percent of movie goers is 36.41% to 44.25%

<u>Solution-</u>

Given,

n = 600 (sample size)

x = 252 (number of people who bought)

Confidence interval = 95%, so z = 1.96

We know that,

\mu = M\pm Z(SE)

where,

M = sample mean

Z  = Z statistic determined by confidence level

SE = standard error of mean

Calculating the values,

M=\frac{x}{n} =\frac{242}{600} =0.4033

Z=1.96 from the tables

SE=\sqrt{\frac{M\times (1-M)}{n}}

\Rightarrow SE=\sqrt{\frac{0.4033\times (1-0.4033)}{600}}=0.02

Putting all the values in the formula,

\mu = M\pm Z(SE)

\mu = 0.4033\pm 1.96(0.02)

=0.4033\pm 0.0392

=0.4425, 0.3641

= 44.25\%,36.41\%

5 0
3 years ago
Other questions:
  • How does 10 to the 2nd power -8 +4 x 3 =288?
    7·1 answer
  • List the next three terms in the following sequence: 1, 2, 4, 8, 16, 32
    13·2 answers
  • Triangle abc is an isosceles triangle with segment ab congruent with segment bc, and the measure of the vertex angle b is twice
    8·1 answer
  • If a real estate broker makes a 6% commision on the sale of every house, how much would the broker make for selling an $80,000 h
    15·2 answers
  • Please answer it now in two minutes
    13·1 answer
  • Melissa wants to put a bird bath in her yard at point (x, y), and wants it to be is inside the enclosed shaded area shown in the
    8·1 answer
  • What is the difference?<br> 2x+5 3х+5 X+ 1<br> x² – 3x - gx x²-g
    7·1 answer
  • A birthday celebration meal is $ 46.80
    9·1 answer
  • Determine whether each quadrilateral is a parallelogram. Write yes or no. If yes, give a reason for your answer. ​
    9·1 answer
  • 7/8=21/n plz this is due tomorrow
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!