Total number of die rolls
Decide whether the random variable x is discrete or continuous. x represents the total number of die rolls required for an individual to roll a five.
Discrete or continuous?
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A flat-bottomed barge, 25 m long and 10 m wide, submerged to a depth of 1.5 m, is to be pushed up a river at a rate of 8.6 km/hr. Calculate the power needed to overcome skin friction (in kW) if the temperature of the water is 15oC.
A soccer ball is kicked at an angle of 62 degrees to the horizontal, with an initial speed of 18 m/s. Assume for the moment that we can neglect air resistance. How long is the ball in the air (in s)?
The weights of a random sample of 49 university male first-year students yielded a mean of 165 pounds and a standard deviation of 6.5 pounds. Determine a 90% confidence interval for the mean weight of all university male first-year students.
A heat engine utilizes a heat source at 460°C and has an ideal (Carnot) efficiency of 30%. To increase the ideal efficiency to 40%, what must be the temperature of the heat source?
What percent of the sample reports not drinking?a. Are there independent and dependent variables in this case? If so, what are they? If not, why not?
A tank of propane has capacity of 120 gallons, what would the tank be rated in terms of cubic feet, cubic meters and liters? If the pressure gage shows a reading of 45psig.
A mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.24 cm. a) If the spring constant is 234 N/m and the mass is 0.580 kg, determine the mechanical energy of the system.
The highest barrier that a projectile can clear is 13.1 m, when the projectile is launched at an angle of 14.0° above the horizontal. What is the projectile's launch speed?
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