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What percentage of rivers had suspended solid concentration greater than or equal to 70? Compute mean of this frequency distribution.
If four people are arbitarily selected, determine probability that they all used seat belt last time they got into their car.
A couple wishes to have two children. Find the probability that (a) first or the second is boy (= at least one girl), (b) both children have same gende
The rest of runners did not finish the race. Compute number of runners who finished race in less than 4 hours. Illustrate your work.
For six year period, Amanda deposited $700 each quarter into account paying 5.6% annual interest compounded quarterly. How much money was in account at end of 6 years?
Alyssa arbitarily selects 3 different names of list of 800 students. Write the chances first choice is a girl? Second choice is girl? Third choice is girl?
Find, in terms of magnitude of acceleration due to gravity, g, maximum height that ball reaches above point of projection, and time taken to reach this position.
Fifteen countries were arbitarily selected from World Factbook 2004 list of world countries. Compute first and third quartile for the infant mortality per 1000 rate.
The following data lists average monthly snowfall for January in 15 cities around US. Determine mean, variance, and standard deviation. Show all of your work.
Math test has the mean of 49 and standard deviation of 10.0. Determine the corresponding z scores for: test score of 62 .
Nine college students had eaten following number of times at fast food restaurant for dinner. Compute the mean, median, mode, range, and midrange for the data.
Use Empirical Rule to determine what two values 99.7% of data will fall between for data set with mean of 297 and standard deviation of 18.
The number of pink hydrangeas as in first bed. Use system of equations to find how many white and how many pink hydrangeas gardeners must buy altogether.
Assume temperatures increases at constant rate. Construct graph of time and temperatures at each hour from 1:00pm to 8:00pm. Is relationship proportional? Describe.
Use the information to did upper and lower limits of first class if you wish to create frequency distribution with 10 classes.
At fair games, Nick has 215 points and Isaac has 78 points. They combine their points to exchange for three prizes. Write the two sets of three prizes they can get?
Engineer is asked to design water sprinkler which will cover field of 100 square yards that is in shape of sector of circle of radius 15 yards.
Where x is measure of distance from the center of the hexagon to midpoint of a side. Determine the side length of a hexagon?
thousand pounds for t between 0 and 0.0006 seconds. Find maximum force on ball? Using m = 0.01 for mass of baseball, find change in velocity v (in ft/s).
Nelson Diebel swam 100 meters in 62 seconds, and Mike Bowermen swam 200 meters in 130 seconds. Are rates proportional?
The company wanted to test sample of people who fall in between 1.5 and 3 z-score above mean. Into what range should candidate to be included in study?
The first week they practiced for 2.4 hours each day for 4 days. Second week they practiced total of 8.75 hours. How many hours did cheerleaders practice third week?
Deduce linear equations in X and Y to represent component of original and revised invoices, where x is price of single ledger book and y is price of a filing tray.
The mass of ball must be 430 grams plus or minus 20 grams. Which absolute value inequality describes m, mass of a ball in grams which satisfies the rule?
Walkers are 1/2 the total of the bus riders. how many students ride bus? how many students ride in cars and how many walk to school?