childrenofdecadence
Calculators
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
childrenofdecadence
childrenofdecadence
Home
General
Algebra
Geometry
Coordinate-geometry
Statistics
Calculus
Qna
Math
MATH SOLVE
Home
A certain list consists of 3 different numbers. Does the median of the 3 numbers equal the average (arithmetic mean) of the 3 numbers?(1) The range of the 3 numbers is equal to twice the difference between the greatest number and the median.(2) The sum of the 3 numbers is equal to 3 times one of the numbers.
General
4 months ago
An investment of $29,000 was made by a business club. The investment was split into three parts and lasted for one year. The first part of the investment earned 8% interest, the second 6%, and the third 9%. Total interest from the investments was $ 2250. The interest from the first investment was 4 times the interest from the second. Find the amounts of the three parts of the investment.
General
4 months ago
Assume the readings on thermometers are normally distributed with a mean of 0degreesC and a standard deviation of 1.00degreesC. Find the probability that a randomly selected thermometer reads between negative 0.99 and negative 0.32 and draw a sketch of the region.
General
4 months ago
The cost C, in dollars, to remove p percent of a certain pollutant from a pond is estimated by using the formula C=100,000p/100-p. According to the estimate, how much more would it cost to remove 90% of the pollutant from the pond than it would cost to remove 80% of the pollutant? (A) $500,000 (B) $100,000 (C) $50,000 (D) $10,000 (E) $5,000
General
4 months ago
Home sales again In the previous exercise, you found a 95% confidence interval to estimate the average loss in home value. a) Suppose the standard deviation of the losses had been $3000 instead of $1500. What would the larger standard deviation do to the width of the confidence interval (assuming the same level of confidence)? b) Your classmate suggests that the margin of error in the interval could be reduced if the confidence level were changed to 90% instead of 95%. Do you agree with this statement? Why or why not? c) Instead of changing the level of confidence, would it be more statistically
General
4 months ago
Apply the method of undetermined coefficients to find a particular solution to the following system.wing system.y" - y' + y = sin x. y" - 3y' + 2y = e^x sin x. y" + y = x cos(2x).
General
4 months ago
According to the Centers for Disease Control and Prevention, the proportion of U.S. adults age 25 or older who smoke is 0.22. A researcher suspects that the rate is lower among U.S. adults 25 or older who have a bachelor's degree. She took a random sample of 275 U.S. adults 25 or older who have a bachelor's degree, and the proportion of smokers in her sample is 0.18. What is the null hypothesis in this case? What is the alternative hypothesis in this case?
General
4 months ago
Martina is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Company A charges $117 and allows unlimited mileage. Company B has an initial fee of $75 and charges an additional $0.70 for every mile driven. For what mileages will Company A charge less than Company B? Use for the number of miles driven, and solve your inequality for .
General
4 months ago
Let the Universal Set, S, have 203 elements. A and B are subsets of S. Set A contains 98 elements and Set B contains 81 elements. If the total number of elements in either A or B is 173, how many elements are in A but not in B?
General
4 months ago
A total of 3 cards are chosen at random, without replacing them, from a standard deck of 52 playing cards. What is the probability of choosing 3 king cards? 113⋅351⋅125=15525 113⋅113⋅113=313 452⋅352⋅252=417576 113⋅113⋅113=42197
General
4 months ago
The height of a triangle is 4 in. Greater than twice its base. The area of the triangle is no more than 168 in.2. Which inequality can be used to find the possible lengths?
General
4 months ago
Use logarithmic properties and the fact that ln(2) ≈ 0.69 and ln(3) ≈ 1.10 to approximate the value of each of thefollowing logarithmic expressions. Do not use a calculator. ln(108)
General
4 months ago
Axel and his brother like to play tennis. About three months ago they decided to keep track of how many games each has won. As of today, Axel has won 18 out of the 30 games against his brother.a. How many games would Axel have to win in a row in order to have a 75% winning record?b. How many games would Axel have to win in a row in order to have a 90% winning record?c. Is Axel ever able to reach a 100% winning record? Explain why or why not.d. Suppose that after reaching a winning record of 90% in part (b), Axel had a losing streak. How many games in a row would Axel have to lose in order to drop down to a winning record of 60% again?
General
4 months ago
Under what conditions might two parabolas be congruent? Explain your reasoning.
General
4 months ago
in the straightedge and compass construction of the perpendicular line below, how do you know that AB l CD?
General
4 months ago
Jim tells you he paid a total of $23,078.90 for a car, and you would like to know the price of the car before sales tax so that you can compare the price of that model of car at various dealers. Find the price of the car before sales tax if Jim bought the car in each of the following states:a. Arizona, where the sales tax is 6.6%.b. New York, where the sales tax is 8.25%.c. A state where the sales tax is ????%.
General
4 months ago
The length, 18 meters, is the answer to the following question."The length of a rectangle is three meters longer than its width. The area of the rectangle is 270 square meters. What is the length of the rectangle?"Rework this problem: Write an equation using ???? as the length (in meters) of the rectangle that would lead to the solution of the problem. Check that the answer above is correct by substituting 18 for ???? in your equation.
General
4 months ago
The length of a rectangle is 5 inches less than 3 times the width. The perimeter is 70 inches. Find the length and the width. The length is __ inches and the width is __ inches.
General
4 months ago
Consider a circle with radius 5 and another circle with radius 3. Let d represent the distance between the two centers.We want to know how many intersections there are of these two circles for different values of d.Draw figure id d=10?
General
4 months ago
A rope 25 feet long is cut into 3 pieces. The first piece is 4x feet long, the second piece is 3x feet long and the third is is 4 feet long. Find the length of each price of rope
General
4 months ago
Previous
1
2
3
4
5
6
7
8
9
10
11
12
13
Next