What is the solution to (4 x 10^3) x (3x10^4) written in scientific notation?

Enter the missing numbers in the boxes to complete the table of equivalent ratios. time (min) distance (km)? 36 9? 1512 ?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83