PLEASE HELP AND EXPLAIN STEP BY STEP.​

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

Acar loses a quarter of its value every year. it is originally worth $35,000. to the nearest dollar,how much will the car be worth in 8 years?