5.4.71 If a person bends at the waist with a straight back making an angle of 0 degrees with the horizontal, then the force F exerted on the back muscles can be modeled by the equation shown below, where W is the weight of the person. Complete parts (a) through (c). 0.6W sin (0+90°) F= sin 12° (a) Calculate F when W = 190 lb and 0= 35°. F= Ib (Round to the nearest pound as needed.)

A boat leaves a port traveling due east at 18 mi/hr. At the same​ time, another boat leaves the same port traveling northeast at 17 mi/hr. The angle θ of the line between the boats is measured relative to due north​ (see the figure to the​ right). What is the rate of change of this angle 30 min after the boats leave the​ port? 2 hr after the boats leave the​ port?

The polar coordinates of a point are given. Find the rectangular coordinates of the point. (-) - 5,- 3 5/3 O A. 1, 5 5/3 Ов. 2' 2 5 -5/3 | OC. 2' 2 - 5/3 O D. 1, 2

Find the tangent of U A. 48/55 B. 48/73 C. 55/48 D. 55/73