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2 years ago

Stacy's Checking Account

Mathematics

1 answer:

Sergio039 [100]2 years ago

4 0

If the question is asking how much Stacy has left it’s 500.

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A set of N = 20 exam scores has a mean of m = 50. The instructor discovered that an error was made grading one exam, so 20 point

tatuchka [14]

Answer:

The new mean for the exam scores is 51

Step-by-step explanation:

the mean can be calculated using the formula

mean of scores = $\frac{Sum total of scores}{Number of students}$

before the 20 points was added, the mean of the score was = 50.

Inserting this into the formula, we have:

50 = $\frac{Sum total}{20 students}$

from this, we can compute the sum total of the scores as

sum total = 50 × 20 = 1000

when the extra 20 marks is added, the sum of the entire scores will be changed to 1000 + 20 = 1020.

Hence the new mean will be computed as (New Sum total of scores / Number of students)

= $\frac{1020}{20}$ = 51.

∴ The new mean of the scores is = 51

8 0

3 years ago

Identify the horizontal and vertical intercepts of the limacon represented by the equation r=4-6 sin theta.

NISA [10]

Answer:

Vertical intercepts: (-2,pi/2) and (-10,pi/2)

Horizontal intercepts: (4,0) and (-4,0)

Step-by-step explanation:

I took the test and got it right.

6 0

3 years ago

Read 2 more answers

Find the coordinates of the missing endpoint if B is the midpoint of AC. C(-6,-2),B(-3,-5)

Margaret [11]

Answer:

A = (0, -8)

Step-by-step explanation:

B = (A+C)/2 . . . . the midpoint is the average of the end points

A = 2B -C = 2(-3, -5) -(-6, -2) . . . solve for A, substitute point values

A = (0, -8)

5 0

2 years ago

What is 4 to the 6th power over 4 to the 8th power?

andreev551 [17]

4⁶ / 4⁸

Since the 'bases' are the same on top and bottom, you can
just subtract the bottom exponent from the top one.

4⁶ / 4⁸
= 4⁶⁻⁸
= 4⁻²
= 1/4²
= 1/16

8 0

2 years ago

he following data set shows the number of dogs counted in a local park each Saturday for 4 months. 33, 36, 31, 37, 37, 38, 31, 3

lana66690 [7]

General Idea:

To create a dot plot for a set of data we should list the data from lowest to greatest number. Then create a number line which covers all the numbers given in the data. We need to plot number of circles one above as many times based on the frequency of the data.

Applying the concept:

33, 36, 31, 37, 37, 38, 31, 37, 35, 31, 38, 32, 36, 33, 38

Listing the data in ascending order we get

31, 31, 31, 32, 33, 33, 35, 36, 36, 37, 37, 37, 38, 38, 38

We need to plot three circles above 31, one circle above 32, two circles above 33, one above 35, two above 36, three above 37, and three above 38.

Conclusion:

Out of the four options, the correct option is B because that is the only dot plot representing the given set of data.

7 0

3 years ago

Read 2 more answers