Question

A ball is dropped from the top of a building that is 1,000 feet high. Its height, in feet, as a function of the time, x, in seconds, after the ball was dropped, is given by the following equation, ƒ(x) = 1,000 - 16x^2. Which set of numbers is appropriate as the domain for this function?

A. Natural Numbers
B. Positive Real Numbers
C. Positive Integers
D. Positive Rational Numbers

Answer 1

I say D.

Answer 2

Domain means the value of x

Answer 3

I know but I don't know how to figure it out

Answer 4

The value of x can not b negative

Answer 5

Because x is actually time needed to fall the object frm building

Answer 6

well I assumed that but aren't all of the answers positive?

Answer 7

x csn b fraction or full number

Answer 8

*Can

Answer 9

so does that mean b or d?

Answer 10

I think so

Answer 11

Which one include fraction?

Answer 12

Well I do not see why the time should be limited only to rational numbers. Lengths are allowed to be irrational as well. The only restriction we have is that it has to be positive. So I'd say B - Positive Real Numbers

Answer 13

Thanks for your help :D

Answer 14

You're welcome =)