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which numbers are a distance of 7 units from -2 on a number line
General
2 months ago
Kerrie uses the work shown below to determine 35% of 280.Step 1: 35% = 10% + 25%Step 2: 10% of 280 = 280:10 = 28Step 3: 25% of 280 = 280 : 4 = 70Step 4: 28 + 70 = 98She states that 35% of 280 is 98. Which is a true statement about Kerrie's solution?Kerrie's solution is correct.Kerrie incorrectly determined 10% in Step 2.Kerrie incorrectly determined 25% in Step 3.Kerrie incorrectly combined the solutions from Step 2 and Step 3 in Step 4.
General
2 months ago
A company that manufactures gift boxes wants to know how many different-sized boxes having a volume of 50 cubic centimeters it can make if the dimensions must be whole centimeters.a. List all the possible whole number dimensions for the box.b. Which possibility requires the least amount of material to make?c. Which box would you recommend the company use? Why?
General
2 months ago
The figure in Quadrant III of the coordinate plane below is a transformation of the figure in quadrant II.
General
2 months ago
Pablo generates the function f (x) = three-halves (five-halves) Superscript x minus 1 to determine the xth number in a sequence.Which is an equivalent representation? f(x + 1) = Five-halvesf(x)f(x) = Five-halvesf(x + 1)f(x + 1) = Three-halvesf(x)f(x) = Three-halvesf(x + 1)
General
2 months ago
Vincent put logs in the shape of a rectangular prism outside his house. However, it is supposed to snow, and Vincent wants to buy a cover so the logs stay dry. If the pile of logs creates a rectangular prism with these measurements:33 cm long, 12 cm wide, and 48 cm high,what is the minimum amount of material needed to cover the pile of logs?
General
2 months ago
5 PolntsIf f(x) = 2x² - 5 and g(x) = x2 - 4x - 8, find (f - g)(x).O A. (8-9)(x) = -x2 - 13O B. (8-9)(x) = x2 + 4x+ 3O c. (- g)(x) = 3x² - 4x - 13O D. (- g)(x) = x2 - 4x - 3
General
2 months ago
In △ABC, P∈ AC so that AP:PC=3:2. If ABPC=14m2. Find AABP and AABC.
General
2 months ago
Michael is doing an underwater handstand. His feet are sticking up .05 meters above the water. Michaels hands are 1.8 meters directly below his feet. What is the position of michael’s hands relative to the surface of water?
General
2 months ago
Pulse rates of women are normally distributed with a mean of 77.5 beats per minute and a standard deviation of 11.6 beats per minute.a)What are the values of the mean and standard deviation after converting all pulse rates of women to z-scores using z=(x−μ)/σ?b)The original pulse rates are measured with units of "beats per minute." What are the units of the corresponding z-scores?
General
2 months ago
A bag of M&Ms was randomly selected from the grocery store shelf, and the color counts were: Brown 24 Red 22 Yellow 20 Orange 15 Green 15 Blue 15 .Find the 95% confidence interval for the proportion of red M&Ms in that bag.
General
2 months ago
A new design for the braking system on a certain type of car has been proposed. For the current system, the true average braking distance at 40 mph under specified conditions is known to be 120 ft. It is proposed that the new design be implemented only if sample data strongly indicates a reduction in true average braking for the new design. Define the parameter of interest and state the relevant hypothesis. Suppose braking distance for the new system is normally distributed with sigma = 10. Let X denote the sample average braking distance for a random sample of 36 observations. Which of the following three rejection regions is appropriate : What is the significance level for the appropriate region of part(b)?How would you change the region to obtain a test with alpha = 0.001? What is the probability that the new design is not implemented when its true average braking distance is actually 115 ft and the appropriate region from part (b) is used? Let Z = (x - 120)/ (sigma / n), what is the significance level for the region {z : z le -2.33}? For the region {z : z le -2.88}?
General
2 months ago
A new cream advertises that it can reduce wrinkles and improve skin. In a recent study, a sample of 64 women over the age of 50 used the new cream for 6 months. Of those 64 women, 58 of them reported skin improvement (as judged by a dermatologist). Is this evidence that the cream will improve the skin of more than 60% of women over the age of 50? Test using α=0.01.
General
2 months ago
A noted psychic was tested for ESP. The psychic was presented with 200 cards face down and was asked to determine if the card was one of 5 symbols: a star, cross, circle, square, or three wavy lines. The psychic was correct in 49 cases. Let pp represent the probability that the psychic correctly identifies the symbol on the card in a random trial. Assume the 200 trials can be treated as an SRS from the population of all guesses. To see if there is evidence that the psychic is doing better than just guessing, we testH0:p=.2H0:p=.2Ha:p>.2Ha:p>.2(a) What is the zz-statistic for this test? (b) What is the P-value of the test?
General
2 months ago
Find the work required to move an object in the force field F = e^x + y (1, 1, z) along the straight line from A(0, 0, 0) to B(-4, 5, -5). Check to see if the force is conservative. Select the correct choice below and fill in the answer box to complete your choice. (Type an exact answer.) A. The force is not conservative. The work is ___. B. The force is conservative. The work is _____ .
General
2 months ago
A scientist is cooling a liquid at a steady rate. The temperature of the liquid changed by −82 1/2 °C over 2 1/5 minutes. What was the temperature change after 1 minute?
General
2 months ago
For the choir concert, the choir director has asked that everyone wear either black pants or blue jeans. Three times as many students wore black pants as blue jeans. If there are forty-four students in the choir, how many wore blue jeans?
General
2 months ago
PLEASE PLEASE HELP ME!!!!!! DO NOT DO IT FOR POINTS! I GENUINELY NEED HELP! 1. Rewrite each expression by combining like terms. 8 p q − 3 p q and 2 m − 3 m + 42. A carnival costs $10.50 to enter plus an additional $3.50 per ticket for rides and food.Write an algebraic expression to represent the total cost for a visit to the carnival. Let n represent the number of tickets purchased.What is the total cost to visit the fair if you purchase 20 tickets? Explain your reasoning.3. Which expression is equivalent to 8−4(x−6)/4?A. x+32B. −x+8C.−4x−8D. x−7/2THERE WILL BE TOMORROW!!THANK YOU SO SO SO MUCH!!
General
2 months ago
A random sample of the closing stock prices in dollars for a company in a recent year is listed below. Assume that sigma is $2.15. Construct the 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. 18.41 19.11 18.67 18.97 21.97 17.26 18.69 16.73 21.97 16.43 21.97 21.66 18.77 17.93 15.47 16.44 The 90% confidence interval is ______________
General
2 months ago
1) In a comprehensive road test on all new car models, one variable measured is the time it takes a car to accelerate from 0 to 60 miles per hour. To model acceleration time, a regression analysis is conducted on a random sample of 129 new cars. Given: R^2= 0.6960 Approximately what percentage of the sample variation in acceleration time can be explained by the simple linear model? (Points : 1) 8% -17% 0% 70%2)The coefficient of correlation between x and y is r = 0.59. Calculate the coefficient of determination R^2
General
2 months ago
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