Which statement about the relationship between laws, hypotheses, and theories is true? a. laws that remain true over an extended period of time are considered theories. b. a theory that holds true for a long time is considered a law. c. if a law is not contradicted after a lot of testing, it may be considered a hypothesis. d. if a hypothesis is not contradicted after a lot of testing, it may be considered a law.

Sandy is building a small toy car. he wants to use a balloon to power the toy car. he fills a balloon with air and then attaches a straw to the balloon. he tapes the balloon-straw combination to the car and then releases the end of the balloon. the toy moves forward as the air from the balloon comes out the back of the straw. what can sandy do to make the toy car move faster? a) use less air in the balloon. b) blow up the balloon more. c) use a longer straw. d) use larger tires.