Gena wants to estimate the quotient of -21.87 divided by 4.79. Which expression shows the best expression to estimate the quotient using front-end estimation?
O-21-4
-21-5
O-20-4
-20+5

Indicate the formula for the following conditions: p^c(n,r)=

Point s lies between points r and t on . if rt is 10 centimeters long, what is st? 2 centimeters 4 centimeters 6 centimeters 8 centimeters

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.