You and your friend are standing on a cliff that is 50 meters above ground. You throw a rock up into the air with an initial velocity of 15 m/s. Your friend drops another rock at the same time. Whose rock will hit the water first and by how long? Round to the nearest tenth, if necessary.

i have no idea just need points sorry

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.

17,000 is the correct answer.