Which of these is an example of a non-random sample?
A.
At a school assembly, five students are randomly chosen to receive free admission to a theme park.

B.
Airline passengers to Orlando, Florida, are asked about vacation plans.

C.
Out of all the seventh grade students in a public school district, fifteen are chosen to win a trip to a vacation destination.

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.