Lines ad , be , and fc intersect at point o. c given: m∠aob = 50°, m∠foe = 70°. find m∠aoc, m∠coe, and m∠cod.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?