2points
some psychologists believe that a genius should be defined as anyone
having an iq over 140. if iq scores are normally distributed with a mean of
100 and a standard deviation of 17 and if the population of the world is
6,575,000,000, how many geniuses are there in the world today?
o
a. 115,000
o
b. 24,985,000
o
o
o
c. 6,575,000
d. 61,805,000
e. 123,000

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

3.4a=57.8 what is the the value of a

An isosceles trapezoid with a perimeter of 42 inches. each of the congruent non parallel sides is 5 inches long, and the trapezoid is 3 inches tall. how long are the two parallel sides? a. 10 in, 22 in b. 16 in, 16 in c. 10 in, 16 in d. 12 in, 20 in