Instructions:Select the correct answer.
The population of California is approximately 38,040,000. The population of Texas is about 2.606 × 107. What is the approximate total population of these two states? (SCIENTIFIC NOTATION, adding and subtracting )

a)40.646 × 107
b)40.646 × 106
c)6.410 × 107
d)6.410 × 1014