Aclimber is standing at the top of a mountain, approximately 2.5 mi above sea level. the radius of the earth is 3959 mi. what is the climber's distance to the horizon?

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?

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?

In the diagram below,abc is congruent to dec what is the value of x