The distance around the auxiliary track is 400 meters what is the distance in kilometers

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

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

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)