At a conference, four speakers are evenly dividing up the time in a 45-minute session. How much time will each speaker get?

11.25

Step-by-step explanation:

you will divide the total time (45 mintues) by the 4 speakers bc the question said tht each speaker will have the same time (evenly divided time)

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92