Chile rode her bicycle from her house directly to the library in 4 minutes. the library is 1 mile from her house.
part a: what is chloe's speed in miles per hour? show your work and explain you reasoning.
part b: chloe's trip back to her house took twice as long as her trip to the library. what was chloe's average speed for the entire trip (from her house to the library and back to her house)? show your work and explain your reasoning.
a. k.a : i need this !

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

What is the area of a pizza with a radius of 40 cm leave the answer in terms of π to find your exact answer 40π cm² 1600π cm² 800π cm² 80π cm² π=pi

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?