In a right triangle δabc, the length of leg ac = 5 ft and the hypotenuse ab = 13 ft. find the length of the angle bisector of angle ∠a.

Write two subtraction equations that are equivalent to 5 + 12 = 17.

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).