Which expressions is equivalent to 4⋅4⋅4⋅4⋅4
4^4
5^4
4^5

"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 expression is equivalent to 8(k + m) − 15(2k + 5m)?

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?