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MATH SOLVE
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The pmf of the amount of memory X (GB) in a purchased flash drive is given as the following. x 1 2 4 8 16 p(x) 0.05 0.10 0.30 0.40 0.15 (a) Compute E(X).
General
2 months ago
A manufacturer of matches randomly and independently puts 22 matches in each box of matches produced. The company knows that one-tenth of 5 percent of the matches are flawed. What is the probability that a matchbox will have one or fewer matches with a flaw?
General
2 months ago
Solve for x in the equation x2 + 10x+12 = 36 х = –12 оr x = 2x = -11 or x = 1x = -2 or x = 12x = -1 or x = 11
General
2 months ago
What is 6(1+3m)=-8-2m+5)-4
General
2 months ago
(ax + by)(cx – dy)In the expression above, a, b, c, and d are non-zeroconstants and ad = bc. If ac = 18 and bd = 50, what.is the value of the coefficient of the xy term whenthe expression is multiplied out and the like termsare collected?
General
2 months ago
What is the simplified value of the exponential expression 27 Superscript one-third?
General
2 months ago
The length of a rectangle is seven inches more than its width. Its area is 78 square inches. Find the width and length of the rectangle.I'm getting 16 and 23 but my online homework says its wrong
General
2 months ago
Joshua spends 25 minutes of each day reading. Let d be the number of days that he reads, and let m represent the total minutes of reading. Determine which variable is independent and which is dependent. Then, write an equation that models the situation. Make a table showing the number of minutes spent reading over 7 days.
General
2 months ago
The distance from New York City to Los Angeles is 4090 kilometers. a. [3 pts]What is the distance in miles? (You must use unit fractions. Round to the nearest mile and be sure to include units.) b. [3 pts]If your car averages 31 miles per gallon, how many gallons of gas can you expect to use driving from New York to Los Angeles? (You must use unit fractions. Round to one decimal place and be sure to include units.)
General
2 months ago
Polygon WXYZ has vertices W(-1.5, 1.5),X(6, 1.5), Y6, -4.5), and Z(-1.5, -4.5). IsWXYZ a rectangle? Justify your answer.
General
2 months ago
For males the expected pulse rate is 70 per second and the standard deviation is 10 per second. For women the expected pulse rate is 77 per second and the standard deviation is 12 per second. Let !X ¼ the sample average pulse rate for a random sample of 40 men and let !Y ¼ the sample average pulse rate for a random sample of 36 women.What is the approximate distribution of \overline{X}-\overline{Y} ? Justify your answer.
General
2 months ago
onsider the following. (a) Explain why −0.41 cannot be the probability of some event. A probability must be between zero and one. A probability must be greater than one. A probability must be an integer. (b) Explain why 1.21 cannot be the probability of some event. A probability must be between zero and one. A probability must be an integer. A probability must be negative. (c) Explain why 120% cannot be the probability of some event. A probability must be between zero and one. A probability must be an integer. A probability must be negative. (d) Can the number 0.56 be the probability of an event? Explain. No, this is too large to be a probability. No, a probability cannot be positive. Yes, it is a number between 0 and 1. Yes, it is a number between 0.5 and 1.
General
2 months ago
Richard and Kayla have 48 apples. Kayla has 35% more apples than Richard.A) Write an equation that represents this situationB) If Kayla has 162 apples, how many apples does Richard have?
General
2 months ago
two angles are supplementary. twice the measure of the first angle minus 9 is equal to the measure of the second angle. find the measures of both angles
General
2 months ago
A new cream that advertises that it can reduce wrinkles and improve skin was subject to a recent study. A sample of 70 women over the age of 50 used the new cream for 6 months. Of those 70 women, 35 of them reported skin improvement (as judged by a dermatologist). Is this evidence that the cream will improve the skin of more than 40% of women over the age of 50? Test using α=0.01.
General
2 months ago
The mean preparation fee H&R Block charged retail customers in 2012 was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50. Use z-table here (link below). Round to four decimal places.a. What is the probability that the mean price for a sample of 30 H&R Block retail customers is within $8 of the population mean?b. What is the probability that the mean price for a sample of 50 H&R Block retail customers is within $8 of the population mean?c. What is the probability that the mean price for a sample of 100 H&R Block retail customers is within $8 of the population mean?d. Which, if any, of the sample sizes in parts (a), (b), and (c) would you recommend to have at least a 0.95 probability that the sample mean is within $8 of the population mean?
General
2 months ago
Robert is inspecting a shipment of 22-inch pipes. The lengths of the pipesmay vary by 1%. What is the range of allowable lengths of the pipes?luat his car it averaqed 28 miles per gallon of gas. Now, the
General
2 months ago
Begin by clearly stating the problem; you can copy this from the problem set file. Show how you solved the problem step by step, including any formulas or equations that you used. Finally, state your final answer in a complete sentence, and make sure that you include the correct units with you answer. Place both problem solutions in the same response.1.)Raoul's credit card statement showed these transactions during May. May 1 Previous balance $304.29 May 6 Payment $100.00 May 10 Purchases $58.10 May 15 Payment $100.00 May 26 Purchases $114.73 The interest rate is 18% per month on the average daily balance. Find the average daily balance, the finance charge for the month, and the new balance on June 1. [Hint: Remember that May has 31 days.]
General
2 months ago
The rectangle below has an area of 6n4 + 20n3 + 14n?.The width of the rectangle is equal to the greatest common monomial factor of 6n", 20n", and 14n?What is the length and width of the rectangle?LengthWidth201314n2WidthLength =
General
2 months ago
A $1 bet in a state lottery Pick 3 game pays $500 if the 3-digit number you choose exactly matches the winning number, which is drawn at random. Here's the distribution of the payoff X:Payoff X $0 $500Probability 0.999 0.001Each day's drawing is independent of other drawings.a) What's the mean and the standard deviation of X?b)Joe buys a Pick 3 ticket twice a week. What does the law of large numbers say about the average payoff Joe receives from his bets?c) What does the central limit theorem say about the distribution of Joe's average payoff after 104 bets in a year?
General
2 months ago
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