$160/100x20= $32
160+32= $192
I hope I’m not wrong
The reason why it is 16h is because when you are adding fractions together you cross multiply.
4 1/2 mph and I'm not sure about the other one sorry.
Try this solution (note, this is not the only way):
Q1: if sin(x- 3pi/2)=-sin(3pi/2- x)=--cosx=cosx, then sin(x- 3pi/2)=cosx and sin(x- 3pi/2)=<u>7/25</u>.
Q2: if tan(x)=√3 and x∈(180°;270°), then x=arctan√3+180°=60+180=240°.
If x=240°, then sin(x-210°)=sin30°=<u>0.5</u>.