Find the measure of the angle of elevation of the sun when a vertical light post 15 feet tall casts a shadow 20 feet long.​

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6