Given sin(a) = 7/25 and sin(b) = 12/13
using the sum and difference identities determine the value of
sin(a - b)
sin (a + b)=sin a cos b
cos a sin b
(you may assume angles a and b exist in the first quadrant)

Jamie is hiking up a small mountain. he climbs up at a constant rate of 300 feet/hour until he reaches the peak at 1,500 feet. after that, he hikes down at the same rate to the base of the mountain. the equation that models jamie’s elevation, e, after t hours is e = . jamie’s elevation will be 600 feet after hours and after hours.

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?