Melanie spent four hours babysitting. she charges $16 upfront and then and additional charge per hour. the total amount she earned can be represented by the expression $4x + $16. what expression represents the amount she earns each hour?

The equatorial radius of earth is approximately 6 × 10^3 km, while the equatorial radius of saturn is approximately 6 × 10^4 km. which of the following is true? a. the equatorial radius of saturn is approximately one hundred times that of earth. b. the equatorial radius of saturn is approximately ten times that of earth. c. the equatorial radius of earth is approximately one hundred times that of saturn. d. the equatorial radius of earth is approximately ten times that of saturn.