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Which formula represents the partial sum of the first n terms of the series: 2 + 6 + 10 + ... + (4n - 1)?A) 4n^2 + 2n B) 4n^2 + 1/2n C) 2n^2 + 2n D) 2n^2 + 1/2n Will give brainlist and 15 points to correct answer. Please help.
General
2 months ago
A check of dorm rooms on a large college campus revealed that 34 % had refrigerators, 51 % had TVs, and 21 % had both a refrigerator and a TV. What's the probability that a randomly selected dorm room has
General
2 months ago
Felix has saved $30 per week to buy a new Blu-Ray player. He compares two different models: a Panaview that is priced at $130 and a Zony model that is priced at $140. Felix decides to purchase the Zony Blu-Ray player for $140.Identify what role money plays in each of the following parts of the story.1. Felix can easily determine that the Panaview model has a lower price than the Zony model.2. Felix saved $30 per week.3. Felix pays $140 for the Blu-Ray player.1. Unit of account2. Store of value3. Medium of exchange
General
2 months ago
A researcher reports an F-ratio with df = 2, 18 from an independent-measures research study. Based on the df values, how many treatments were compared in the study and what was the total number of subjects participating in the study?
General
2 months ago
From Jan. 1, 1960 to Jan. 1, 1985, the historical average annual rate of return in the hypothetical country of Westeros was 12%. The annual standard deviation of the rate of return is 10%. What is the upper bound of the 95.4% confidence interval for the annual rate of return based on this information?
General
2 months ago
When the background music tempo was slow, the mean amount of bar purchases for a sample of 19 restaurant patrons was $30.44 with a standard deviation of $15.90. When the background music tempo was fast, the mean amount of bar purchases for a sample of 14 patrons in the same restaurant was $21.17 with a standard deviation of $9.10. Assuming equal variances, at α = 0.10, is the true mean higher when the music is slow?
General
2 months ago
Two random samples of 40 students were drawn independently from two populations of students. Assume their aptitude tests are normally distributed (total points = 100). The following statistics regarding their scores in an aptitude test were obtained:xbar1 = 76 s1= 8 xbar2 = 72 and s2= 6.5. Do not assume population variances are equal. Use all formulas assuming unequal variances.Test at the 5% significance level to determine whether we can infer that the two population means differ.Explain how to use the 95% confidence interval to test the hypotheses at a = .05.
General
2 months ago
Let f(x) = kx2(2 − x) if 0 ≤ x ≤ 2 and f(x) = 0 if x < 0 or x > 2. (a) For what value of k is f a probability density function? k =_______ (b) For that value of k, find P X ≥ 1 . (c) For that value of k, find the mean.
General
2 months ago
Suppose a package delivery company purchased 17 trucks at the same time. Six trucks were purchased from manufacturer A, five from manufacturer B, and six from manufacturer C. The cost of maintaining each truck was recorded. The company used ANOVA to test if the mean maintenance cost of the trucks from each manufacturer were equal. To apply the F test, how many degrees of freedom must be in the denominator?174314
General
2 months ago
Which of the following Chi-Square tests can be used to determine if a data set follows a Normal distribution? a. Chi Square Test of Association b. Chi-Square Test of Equality of Three or More Population Proportions c. Chi-Square Test of Homogeneity d. Chi-Square Goodness of Fit
General
2 months ago
Vincent wrote an example of a proportion on the board.Evaluate Vincent’s proportion to determine if it is correct. Explain your reasoning.
General
2 months ago
The mean time it takes to walk to the bus stop is 8 minutes (with a standard deviation of 2 minutes) and the mean time it takes for the bus to get to school is 20 minutes (with a standard deviation of 4 minutes). the distributions are normal.a. how long will it take (in minutes), on average, to get to school?b. what is the standard deviation of the trip to school?c. what is the probability that it will take longer than 30 minutes to get to school? due to a miscalculation, you realize it actually takes an average of 10 minutes to walk to the bus stop.d. how long will it take (in minutes), on average, to get to school?e. what is the standard deviation of the trip to school? f. what is the probability that it will take longer than 30 minutes to get to school
General
2 months ago
"On a map, 0.25 inches represents 1 mile. What is the area of a rectangle on the map that is 3.75 inches long and 2.25 inches wide?"270 square miles135 square miles48 square miles24 square miles
General
2 months ago
Jermaine had dinner at his favorite restaurant. If the sales tax rate is 5% and the sales tax on the meal came to $2.00, what was the total cost of the meal, including sales tax and a 15% tip A.$52.50 B.$40.00 C.$48.00 D.57.00
General
2 months ago
HELP, I AM UTTERLY CONFUSED *20 pointsABGF is a square with half the perimeter of square ACDE. GD = 4 in. Find the area of the shaded region.I know that it is 24 but I have no idea how to get there. Can someone please explain?
General
2 months ago
*picture involved, refresh if not visible*"Match each trigonometric value or vocabulary word with its formula or right triangle definition. Use the triangle below."1. (a/c)2. (b/c)3. (opposite/hypotenuse)4. (adjacent/hypotenuse)5. (a/b)6. (b/a)a. sin Bb. cosinec. tan Bd. sin Ae. tan Af. sine
General
2 months ago
Solve x2 + 6x + 10 = 0 using the quadratic formula. what is the solution set?
General
2 months ago
A gallon of paint will cover approximately 450 square feet. an artist wants to paint all the outside surfaces of a cube measuring 12 feet on each edge. what is the least number of gallons of paint he must buy to paint the cube
General
2 months ago
There are 22 rows of seats on a concert hall: 23 seats are in the 1st row, 27 seats on the 2nd row, 31 seats on the 3rd row, and so on. If the price per ticket is $29.99, how much will be the total sales for a one-night concert if all seats are taken?(show work please)
General
2 months ago
Continuous functions f, g are known to have the properties z 4 1 f(x) dx = 19, z 4 1 g(x) dx = 12 respectively. use these to find the value of the integral i = z 4 1 (8f(x) − g(x) + 7) dx. 1. i = 157 2. i = 161 3. i = 159 4. i = 163 5. i = 155
General
2 months ago
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