Here are the approximate populations of three countries, expressed in scientific notation: Panama: 4 x 10^6 Peru: 3.2 x 10^7 Thailand: 7 x 10^7 a.) Lin says that more than 20 times as many people live in Thailand than in Panama. Is this correct? Explain how you know. B.) Decide what power of 10 to put on the label for the rightmost tick mark of this number line so that all three countries' populations can be distinguished. C.) Label each tick mark as a multiple of a power of 10. D.) Plot and label the tree countries' populations on the number line.