The tensile strength x of paper, in pounds per square inch, has µ = 30 and σ = 3. a random sample of size n = 100 is taken from the distribution of tensile strengths. compute the probability that the sample mean x is greater than 29.5 pounds per square inch.

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b