Why is the product of two rational numbers always rational? select from the drop-down menus to correctly complete the proof. let ab and cd represent two rational numbers. this means a, b, c, and d are , and b and d are not 0. the product of the numbers is acbd , where bd is not 0. both ac and bd are , and bd is not 0. because acbd is the ratio of two , the product is a rational number.

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212