Math question.

there are 500 teachers in a school district. the district superintendent wants to determine which proposed school calendar for the next school year is preferred by the majority of teachers in the district.

which of the following would be the most appropriate sampling technique?

a. a survey of every teacher at the five elementary schools in the district.

b. a survey of 10 random teachers from each of the 10 district schools.

c. a survey of 20 random teachers from each of the 10 district schools.

d. a survey of every teacher who has taught in the district for at least 10 years. < < ?

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.