The equitation y=x^2-12x+45 models the number of books y sold in a bookstore x days after an award winning author appeared at an autograph signing event. How many books were sold 12 days after the author appeared at the event?

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

To diagonalize an nxn matrix a means to find an invertible matrix p and a diagonal matrix d such that a pdp d p ap or [1 3 dh epap 3 let a=-3 -5 -3 3 3 1 step 1: find the eigenvalues of matrix a "2's" step 2: find the corresponding eigenvectors of a step 3: createp from eigenvectors in step 2 step 4 create d with matching eigenvalues.