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Create the 90 % confidence interval with margin of error for proportion of all adults who are smokers? What must be minimum sample size to keep Margin of error under 1%?
As number of persons making trip is 13 less capacity of bus, it costs P8 more per student than if bus is filled. Find number of students in trip?
Tom evaluated that he biked five times faster than he walked. If complete trip took him 5 hours and 24 minutes, find his walking and riding speeds?
When car traveling north had gone 15 mi, distance between cars was 5 mi more than distance traveled by car heading east. How far had east bound car travled?
Consider f(x)=x1/3. Create the Taylor series through third derivative term for the function. Use the series to evaluate cube root of 550 by expanding about x0 = 512.
There is 30 mph wind heading west to east. How long it takes to fly 200 miles to SF and how long it takes to fly 200 miles back to NYC.
Boat makes the trip upstream to the certain point in 20 minutes; return trip takes 15 minutes. Find speed of current?
Trip takes 2 hr for Maria and 2.5 hr for Eduardo, as he lives 40 mi farther away. Eduardo travels 5 mph faster than Maria. Determine their average rates.
Determine amount of time he traveled at each of speeds if the total time for endurance program was 2 hours and 21 minutes?
When fritz drives to work the trip takes 40 minutes, but when he takes train it takes 30 minutes. Determine distance fritz travels to work if train travels the average of 15 mph faster than his driv
Ater traveling same amount of time on return flight, pilot mentioned that they yet had 300 kilometers to go. Air speed of plane was 600 kilometers per hour. How fast wind was blowing?
Equation h=-16t^2+112t provides height of the arrow, shot upward from ground with the initial velocity of 112 ft/s, where t is time after arrow leaves ground.
They both reach opposite end from where they begun, turn around and and cross again at the point 18 yards from B. They are both traveling at the constant speed (unknown for each), find total length
Also, Lionel agrees to begin 15min after Robert. If Lionel bikes at 17km/h and Robert at 14km/h, how long it will take Lionel after he begins biking to overtake Robert?
The school is 18 3/4miles south of Pittsburgh and the house is 44 1/4 miles south of Pittsburgh. Write the equation to find distance d1 from Pittsburgh after t hours.
The clothing producer has some pure silk thread and some thread which is 85% silk. How many kilograms of each should be woven together to make 75kg. of the blend which is 96% silk?
It takes the freight train 2 hours longer to travel 200 miles than it takes the express train to travel 280 miles. Rate of express train is 20 miles per hour greater than rate of freight train. Dete
1 hour later a second bus leaves same station, traveling east at the rate of 48 mile per hour. At what time will two buses be 274 miles apart?
The Monorail car traves 100 miles in 50 minutes less time than it takes and automobile to travel same distance. Determine speeds of two vehicles if monorail goes 20 mph faster than automobiles.
The elevator in Washington Monument takes 75 seconds to travel 500 feet to top floor. Find speed of elevator in miles per hour?
Determine time it would take you to ride bicycle home. Determine the time your father will arrive home. Write the equation to find the distance d1, from Pittsburgh after t hours.
Using following information determine expected return, variance, and standard deviation of stock A and B. Also determine covariance and correlation between Stock A and B.
You are then presented chance to change the original pick. Should you switch the original envelope for other unopened enevelope?
Find probability that sample mean of the 36 households is more than $175.00? Suppose standard deviation of population is $32.
Manufacturing of semiconductor chips makes 2% defective chips. Suppose chips are independent and that the lot has 1000 chips.