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The box has eight red balls and one green ball. The ball is selected and replaced. Then the second one is drawn. Determine probability of getting both red?
If two inlet pipes are both open, they can fill the pool in 1 hour and 12 minutes. One of the pipes can fill pool itself in two hours. How long it will take other pipe to fill pool itself?
The bus traveled two hours at the certain speed, then decreased speed by 20 miles/hr and traveled for three more hours.
Tim averaged 30 miles per hour on way in, and 50 miles per hour on way home. Find Tim's average speed for entire trip? Is it possible to find how far Tim drives to work? Describe.
They are 870 mi apart after 3/4 h. If eastbound plane averages 120 mi/h more than westbound plane, find at what rate is every plane flying?
The boatman rows to the place 48 miles distant and back in 14 hours, but discover that he can row four miles with stream in same time as three miles against stream. Determine the rate of stream.
On Monday, he drives at the average rate of 60 km/hr and is 1 minute early to work. If he left home at same time every day, determine distance Mr. Newton travels from home (one way) to work.
Distance between Majorie and dude ranch was (four times square root of 34) miles straight across the rattlesnake-infested canyon.
The train travelled at m mi at the speed of s mph. The bus followed same rout travelled 5 mph slower. How much longer bus took than train to make the trip?
If he reaches the destination in 4 1/2 hours and then returns to the starting point in 3 1/2 hours, how far he traveled by land and how far by water.
If they begin from same place at same time and travel in same direction, after how many hours will faster car be 50 miles ahead of slower car?
Cereals give 500 calories and 40g protein and cost $3; tarts give 600 calories and 20g protein and cost $2. How he/she selects his/her breakfast mix?
In any given week combined hours of regimens B and C may not exceed 11. Compute how many hours of every regimen must they perform in the week to maximize increase in fitness?
In 2013, you borrowed $500 at 18% interest. You repaid the loan with interest in 2014. How much to have available for spending in 2014?
How many different ID cards are possible if there are six digits (slots) on the card and repetition of numerals is allowed? Therefore, this six digit ID is now allowed: 429468
Write first five terms a0, a1, a2, a3, a4. Write out first 3 algebraic equations represented by dynamical system a1 = f1(a0), a2=f2(a0), a3=f3(a0).
Create the list of all samples of size 2 which can be drawn from the set of integers. Sample with replacement; i.e., first number is drawn, observed, and then replaced (returned to sample set) befor
How many hours per week must Antonia spend on every exercise to maximize number of calories she burns? Determine maximum number of calories she will burn?
The tank has 1740 L of pure water. The solution which has 0.07 kg of sugar per liter enters the tank at the rate 9 L/min. Determine amount of sugar in tank after t minutes.
The unknown radioactive element decays in non-radioactive substances. In 760 days radioactivity of the sample decreases by 62 percent.
If you own 300 shares of Alaska Air at $42.88, 350 shares of Best Buy at $51.32, and 250 shares of Ford Motor at $8.51, find portfolio weights of every stock?
How much will you have in the account at the end of 38 years? Suppose that all interest received at end of year is reinvested next year.
Nichols contributes $10,000 cash and equipment having the book value of $3,500. Create entry to record Nichols's investment in partnership, suppose equipment has the fair value of $4,000.
If river flows with uniform speed v and if speed with which boater can row is also v, determine equation of path of boat. How far downstream boater finally lands?
If you plan to do another research about proportion of college women on diet such that margin equals to 0.06 with 99% confidence level, find sample size you require?