Consider a two-dimensional (2d) displacement vector in the x-y plane, with magnitude delta r and angle alpha measured counterclockwise from the positive x-axis. which of these is a correct trigonometric relationship between delta r, alpha, delta r sub x and delta r sub y?

Which system of linear inequalities is represented by the graph? !

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?