What is the product below expressed in scientific nontation? (2.1 x 10^3) (3x 10^6)

A. 6.3 x 10^3
B. 6.3 x 10^6
C. 6.3 x 10^9
D. 6.3 x `10^18

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

Solve for x and select the correct answer

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.