Evaluate the expression. Write your answer in scientific notation. 1. 4.1x10^3) + (3.7x10^2)
2. (1.2x10^(3))*(4x10^(5))

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.