A ball is dropped from a height of 1,936 feet. The height of the ball, in feet, t seconds after it is dropped can be represented by the equation H(t)=−16t^2+1,936. Which of the following represents the domain for the number of seconds the ball is in the air?

A. 0 B. 0 C. all real numbers
D. positive integers

a. -0.3 > -0.33

it is contrapositive

i could not see the question too well so check yourself again too . this is because i want you to get it correct.

answer: it's d

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.