20. If a train travels 40 mph for 12 hours, what is the total distance traveled?
A 30 miles
B 48 miles
C 300 miles
D 480 miles

Find the value of the cosine for angle a

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6

Erinn wrote the equation –5x + 4y = 32 to represent her hourly wage (y) and how this wage has changed during each year that she worked at a company (x). what is the rate of change in erinn's hourly wage per year?