D Question 10 2 pts The term "skyscraper" is reserved for buildings at least 10 floors in height. Research over the last 40 years has shown that the number of floors of newly-built skyscrapers has a mean of 50 floors and a standard deviation of 10 floors. If the number-of-floors distribution is known to be mound-shaped and symmetric, what percentage of the newly-built skyscrapers were less than 40 floors? approximately 34% approximately 2.5% approximately 50% approximately 16% U Question 11 2 pts