What is the value of a+b-c if a=20,b=10,and c=5/1/2

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.