Arectangle has a perimeter of 40.6 miles and a height of 7.8 miles. what is the length of the base?

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Aiko jumped rope for 20 min and stopped at 8: 05 when did she start

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.