A rectangular section of wilderness will be set aside as a new wildlife refuge. Its dimensions are (5 x 10^5) by (4 x 10^4). What is the area of the land? Write your final answer in scientific notation. Explain how you got your answer.

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.