What is the value of k in the function ƒ(x) = 112 - kx if ƒ(-3) = 121?

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.