The sum of a minutes and b seconds, expressed in minutes, is:

"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.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

Math i have no idea how to do a and b