The cellular phone service for a business executive is $80 per month plus $.40 per minute of phone use over 900 min. for a month in which the executive's cellular phone bill was $100.40, how many minutes did the executive use the phone?

The volume of the sun is approximately 1 × 10^18 cu km, while the volume of jupiter is approximately 1 × 10^15 cu km. which of the following is true? a. the volume of jupiter is approximately one thousand times the volume of the sun. b. the volume of jupiter is approximately one hundred times the volume of the sun. c. the volume of the sun is approximately one thousand times the volume of jupiter. d. the volume of the sun is approximately one hundred times the volume of jupiter.