A certain population of bacteria doubles every 60 minutes. Beginning with 50 bacteria in the culture, the population can be represented by the function A=50(2)^t, where A is the number of bacteria after t number of hours. Which of these is the appropriate domain for the function A in terms of given context? a. all integers greater than or equal to 50
b. all integers greater than or equal to 0
c. all real numbers greater than 50
d. all real numbers greater than or equal to 0

Statement reason 1. δabc is similar to δced. given 2. 3. definition of slope 4. slope of slope of definition of slope 5. slope of × slope of multiplying the slopes 6. slope of × slope of substitution property of equality 7. slope of × slope of simplifying the right side the table contains the proof of the relationship between the slopes of two perpendicular lines. what is the reason for statement 2? a. parallel line segments that meet a common perpendicular line are proportional in length. b. the lengths of vertical and horizontal sides in congruent triangles are in a common ratio. c. trigonometric identities determine the lengths of the legs in a right triangle. d. corresponding side lengths in similar triangles are proportional in length.