2. Do quarterbacks have a greater Ability to complete passes when the weather is warm? To investigate, you compare the pass completion percentages for Donovan McNabb in games 50 degrees or warmer and in games under 50 degrees. State the null and
alternative hypotheses for investigating this claim.

How to do this , and can some one explain

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

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.