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MATH SOLVE
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The constant-pressure specific heat of air at 25°C is 1.005 kJ/kg. °C. Express this value in kJ/kg.K, J/g.°C, kcal/ kg. °C, and Btu/lbm-°F.
General
2 months ago
The management of Hartman Rent-A-Car has allocated $2.08 million to buy a fleet of new automobiles consisting of compact, intermediate-size, and full-size cars. Compacts cost $16,000 each, intermediate-size cars cost $24,000 each, and full-size cars cost $32,000 each. If Hartman purchases twice as many compacts as intermediate-size cars and the total number of cars to be purchased is 100, determine how many cars of each type will be purchased. (Assume that the entire budget will be used. Let x, y, and z denote the number of compact, intermediate-sized, and full-size cars purchased, respectively.) = 2,080,000 = x = 100
General
2 months ago
A(1,3,5, 7,9}, B {0,1,2,3,4,5,6, 7,8,9} be the universal set and let A (0,2,4,6,8}, and C {2,3,5,7}. List the elements of the following sets 1.) Let U (a) An B (b) C\B (c) AU (Bnc)
General
2 months ago
Bob has one sister. 1. She is 4 years older than twice Bob’s age2. The sum of their ages is 76what is the answer?
General
2 months ago
The monthly demand for a product is normally distributed with mean = 700 and standard deviation = 200.1. What is probability demand will exceed 900 units in a month?2. What is probability demand will be less than 392 units in a month?
General
2 months ago
If a well was 70-feet deep, the frog climbs 7 feet per hour, and it slips back 2 feet while resting? How long (in hours) will it take for the frog to get out of the well?
General
2 months ago
Consider all 5 letter "words" made from the full English alphabet. (a) How many of these words are there total? (b) How many of these words contain no repeated letters? (c) How many of these words start with an a or end with a z or both (repeated letters are allowed)?
General
2 months ago
For the following linear system, put the augmented coefficient matrix into reduced row-echelon form.2x1 + 3x2 − x3 = 14x1 + 2x2 + x3 = 45x1 + 9x2 + 2x3 = 7
General
2 months ago
What is the volume of a sphere with the surface area of 25 pi yd^2 ?
General
2 months ago
For each function below, determine whether or not the function is injective and whether or not the function is surjective. (You do not need to justify your answer). (a) f:R + R given by f(x) = x2 (b) f:N + N given by f(n) = n2 (c) f: Zx Z → Z given by f(n, k) = n +k
General
2 months ago
Two separate linear functions are expressed by the graph and by the equation. Select all that apply.The slope is negative for both functions.The equation has a steeper slope than the line in the graph.The slope of the line in the graph is -2.The graph and the equation express an equivalent function.
General
2 months ago
Jack was so frustrated with his slow laptop that he threw it out of his second story window. The height, h, of the laptop at time t seconds can be given by the equation h(t)= -16t^2 + 28t + 17. Assuming the laptop hits the ground below, find the domain of the function.
General
2 months ago
According to the U.S. Department of Education. Institute of Education Sciences, National Center for Education Statistics 1,026,000 high school seniors (rounded to the nearest thousand) took the ACT test as part of the college admissions process. The mean composite score was 21.1 with a standard deviation of 4.8. The ACT composite score ranges from 1 to 36, with higher scores indicating greater achievement in high school.According to the central limit theorem, what are the mean and standard error of the distribution of sample means for a sample of 50 students?a. 50 and 21.1b. 21.1 and 4.8c. 21.1 and 0.68d. 21.1 and 0.10
General
2 months ago
Blood potassium level, continued. Judy’s measured potassium level varies according to the Normal distribution with with μ=3.8 and σ=0.2mmol/l. Let’s consider what could happen if we took 4 separate measurements from Judy. What is the blood potassium level L such that the probability is only 0.05 that the average of 4 measurements is less than L? (Hint: This requires a backward Normal calculation.)the book says about 3.64 but i got 3.28
General
2 months ago
assume that the random variable X is normally distributed, with mean ? = 50 and standard deviation ? = 7. Compute the following probabilities. Be sure to draw a normal curve with the area corresponding to the probability shaded.P(56 < X < 68)B- find the value of za.z 0.02C-assume that the random variable X is normally distributed, with mean ? = 50 and standard deviation ? = 7. Find each indicated percentile for X.The 90th percentileD-the graph of a normal curve is given. Use the graph to identify the values of ? and ?.
General
2 months ago
Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 229 with 44 successes. Enter your answer as an open- interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places.99% C.I. =Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.B. Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 298 with 256 successes. Enter your answer as a tri- linear inequality using decimals (not percents) accurate to three decimal places._____< p <______Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.C. We wish to estimate what percent of adult residents in a certain county are parents. Out of 500 adult residents sampled, 405 had kids. Based on this, construct a 95% confidence interval for the proportion pp of adult residents who are parents in this county.Give your answers as decimals, to three places._____ < pp <______D. If n=12, ¯xx¯(x-bar)=32, and s=13, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population.Give your answers to one decimal place.
General
2 months ago
Brandon made $38.00 in 3 hours. How much would he make in 10 hours
General
2 months ago
Pete cut a square window in the wall of his workshop. The window side length measures 18 inches. What is the area of the wall, excluding the window?
General
2 months ago
Suppose a life insurance company sells a $240,000 one year term life insurance policy to a 25-year old female for $210. The probability that the female survives the year is .999592. Compute the expected value of this policy to the insurance company. I thought I would start with x value of 1 - 12, but I'm lost on what my P(X=x) value will be. I can do these when I'm shown a chart, however I'm lost when asked to do them from a story problem... An example would be appreciated. Thank you in advance
General
2 months ago
Air-USA has a policy of booking as many as 24 persons on an airplane that can seat only 22. (Past studies have revealed that only 86% of the booked passengers actually arrive for the flight.) Find the probability that if Air-USA books 24 persons, not enough seats will be available. prob = Is this probability low enough so that overbooking problems will be unusual? (Define unusual as having probability 5% or less) yes, it is low enough no, it is not low enough What about defining unusual as 10% or less? no, it is not low enough yes, it is low enough
General
2 months ago
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