X is Uniform(50, 80). 12
Find E ( X ), Var ( X ), and SD( X ) for the given random variable
65, 75, 8.660254
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Find the product.(4 cos ? + 1)(4 cos ? - 1)
A. 16 cos2? - 8 cos ? - 1 B. 8 cos2? - 1 C. 16 cos2? - sin2 ? D. 16 cos2? - 1
Answer the question(s) based on the following situation: A dishonest coin (landing heads 
of the time) is tossed 1350 times. The random variable X denotes the total number of heads that come up in the 1350 tosses.What is the interquartile range for this distribution?
A. approximately 30.15 B. approximately 18 C. approximately 24.3 D. approximately 12.15 E. none of these
Solve the equation.4p - 18 = 3p - 11
A. 7 B. -8 C. 6 D. 8
The table gives the values of a function obtained from an experiment. Use the values to estimate 
using three equal subintervals with left endpoints.
