southleigh-manor
Calculators
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
southleigh-manor
southleigh-manor
Home
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
MATH SOLVE
Home
Two roommates share a dorm in Richards Hall, The probability that Roommate A is doing homework on a Friday night is .3. The probability that Roommate B is doing homework on a Friday night is .4. The probability that both roommates are doing homework on a Friday night is .2 (notice the two roommates are able to coordinate their decisions, so you can't assume their respective probabilities are independent). Find the probability that: At least one roommate is doing homework this Friday night
General
4 months ago
A plane delivers two types of cargo between two destinations. Each crate of cargo I is 2 cubic feet in volume and 73 pounds in weight, and earns $15 in revenue. Each crate of cargo II is 2 cubic feet in volume and 146 pounds in weight, and earns $45 in revenue. The plane has available at most 130 cubic feet and 5,548 pounds for the crates. Finally, at least twice the number of crates of I as II must be shipped. Find the number of crates of each cargo to ship in order to maximize revenue. Find the maximum revenue.
General
4 months ago
Temperatures are normally expressed in degree Celsius in the Philippines and in Fahrenheit in some western countries. If the function for fahrenheit to celsius conversion is \(T(°C) = (T(°F) - 32) × 5/9\), the celsius to fahrenheit conversion is \(T(°F) = (T(°C) × 9/5) + 32\). 1. What is the equivalent conversion of 72°F to Celsius? Answer °F (Note: with two decimal digits) 2. What is the equivalent conversion of 100°C to Fahrenheit? Answer °F (Note: with two decimal digits)
General
4 months ago
The Bureau of Alcohol, Tobacco, and Firearms (BATF) has been concerned about lead levels in California wines. In a previous testing of wine specimens, lead levels ranging from 50 to 700 parts per billion were recorded. How many wine specimens should be tested if the BATF wishes to estimate the true mean lead level for California wines to within 10 parts per billion with 95% confidence?
General
4 months ago
Which word problem matches the inequality 14w + 30 ≥ 240A. Lea needs at least $240 to buy new headphones... She has already saved $30. She earns $14 for each car she washes. What is the least number of cars she can wash, w, to buy the headphones?B. Lea needs at least $240 to buy new headphones... She has already saved $14. She earns $30 for each car she washes. What is the most number of cars she can wash, w, to buy the headphones?C. Lea needs at least $240 to buy new headphones... She has already saved $30. She earns $14 for each car she washes. What is the most number of cars she can wash, w, to buy the headphones?D. Lea needs at least $240 to buy new headphones... She has already saved $14. She earns $30 for each car she washes. What is the least number of cars she can wash, w, to buy the headphones?
General
4 months ago
The speed of light in vacuum is approximately 300,000,000 kilometers per second, which is rounded from 299,792,458 kilometers per second. What is the maximum number of trailing zeros that can possibly significant?
General
4 months ago
2/3 (w+12) = 3w-6Solution, no solution, or infinite solutions
General
4 months ago
Which system is equivalent to 5x^2+6y^2=50 7x^2+2y^2=10
General
4 months ago
The trace of a square n x n matrix A = (a_ij) is the sum a11 + a22 +...+ ann of the entries on its main diagonal.Let V be the vector space of all 2 x 2 matrices with real entries. Let H be the set of all 2 x 2 matrices with real entries that have trace 0. Is H a subspace of the vector space V?Is H closed under addition? If it is, enter CLOSED. If it is not, enter two matrices in H whose sum is not in H, using a comma separated list and syntax such as [[????,????],[????,????]], [[????,????],[????,????]] for the answer [1324],[5768]. (Hint: to show that H is not closed under addition, it is sufficient to find two idempotent matrices ???? and ???? such that (????+????)2≠(????+????).)
General
4 months ago
Consider the surface f (x comma y comma z )f(x,y,z)equals=negative 2 x squared plus 2 y squared minus 3 z squared plus 3 equals 0−2x2+2y2−3z2+3=0, which may be regarded as a level surface of the function wequals=f (x comma y comma z )f(x,y,z). The point P(negative 2 comma 2 comma 1 )(−2,2,1) is on the surface. a. Find the (three-dimensional) gradient of f and evaluate it at P. b. The heads of all the vectors orthogonal to the gradient with their tails at P form a plane. Find an equation of that plane.
General
4 months ago
what is the slope of the line that passes through the point (9, -1) and (4, -11) answer in simplest form
General
4 months ago
Alexius invests $24,500 in two accounts paying. 5% and 7% annual interest. How much was invested in each account if, after one year, the total interest was $1,595
General
4 months ago
How many Solutions does this system have? (1 point)2x+y=36x=9-3yA)oneB)noneC)infiniteD)two
General
4 months ago
A television sports commentator wants to estimate the proportion of citizens who "follow professional football." (a) What sample size should be obtained if he wants to be within 2 percentage points with 94% confidence if he uses an estimate of 48% obtained from a poll? The sample size is________. (Round up to the nearest integer.) (b) What sample size should be obtained if he wants to be within 2 percentage points with 94% confidence if he does not use any prior estimates? The sample size is _______. (Round up to the nearest integer.)
General
4 months ago
Let's play a game of Russian roulette. You are tied to your chair. Here's a gun, a revolver. Here's the barrel of the gun, six chambers, all empty. Now watch me as I put two bullets into the barrel, into two adjacent chambers. I close the barrel and spin it. I put a gun to your head and pull the trigger. Click. Lucky you! Now I'm going to pull the trigger one more time. Which would you prefer: that I spin the barrel rst or that I just pull the trigger?
General
4 months ago
On Monday, Luis picked up seven scones and four large coffees. He paid $26.16. On Tuesday, Rachel picked up six scones and five large coffees. She paid $25.44. What is the cost of one scone? What is the cost of one large coffee?
General
4 months ago
SAT scores of students at an Ivy League college are distributed with a standard deviation of 250 points. Two statistics students, Raina and Luke, want to estimate the average SAT score of students at this college as part of a class project. They want their margin of error to be no more than 25 points.(a) Raina wants to use a 90% condence interval. How large a sample should she collect?Raina should sample at least people.(b) Luke wants to use a 99% condence interval. Without calculating the actual sample size, determine whether his sample should be larger or smaller than Raina's, and explain your reasoning.smaller since Luke has a higher level of confidence in his results than Rainasmaller because higher degrees of confidence require smaller margins of errorlarger higher degrees of confidence require larger margins of error(c) Calculate the minimum required sample size for Luke.Luke should sample at least people.
General
4 months ago
Sales personnel for Skillings Distributors submit weekly reports listing the customer contacts made during the week. A sample of 65 weekly reports showed a sample mean of 19.5 customer contacts per week. The sample standard deviation was 5.2. Provide 90% and 95% confidence intervals for the population mean number of weekly customer contacts for the sales personnel.
General
4 months ago
Sample mean (M) = 50 Population mean (µ) = µM = 47 Sample standard deviation (s) = 4 Sample size (N) = 25 Based on this information, compute the t statistic for a one-sample t test. (You may need to compute some other values before computing the t statistic itself). When reporting your t statistic, please provide at least two decimal places.
General
4 months ago
Please show work! I don't understand how this problem works!!! I will give branliest for best answer!
General
4 months ago
Previous
1
2
3
4
5
6
7
8
9
10
11
12
13
Next