Nayib learned from Dr. Mills how to invest money in the stock market and has become VERY rich. His Amazon stocks are worth $4.52 x 10^7 and his Apple stocks are worth $7.3 x 10^6. Erick is his accountant and wants to find the sum of the value of the 2 stocks. Which expressions can he use? Select ALL That Apply.

A.4.52 x 10^7 + 7.3 x 10^6
B.45.2 x 10^6 + 7.3 x 10^6
C.4.52 x 10^7 + 0.73 x 10^7
D.45.2 x 10^7 + 7.3 x 10^7