Lynne is driving at a constant rate of 48 miles per hour. how far will she drive in 4 hours?
a. 144 miles
b. 148 miles
c. 192 miles
d. 196 miles

The answer is C, because you multiply it by 4 which equals 192.

Since this is a right triangle, a triangle with a 90 degree-angle, we can use the trigonometric functions. An example would be the sine function. With respect to the angle, it has the opposite side (o), the adjacent side (a), and the longest side called hypotenuse (h). For the sine function, it would be sine theta = opposite/hypotenuse. Using this relationship,

sin 38 = BC/5
BC = 5*sin38
BC = 3.08 units