Question

LAST QUESTION HOW DO I DO THIS!!!!!!

Answer 1

I like to help, but you're literally just copy pasting every question and letting others solve it for you.

Answer 2

No I want people to explain how to do it, this is my pretest I want to go in having some kind of idea on how to do it all

Answer 3

the question asks you about domain. what does that mean?

Answer 4

the bottom
of the fraction

Answer 5

no the input

Answer 6

a function can be described in terms of both range and domain. what do those words mean?

Answer 7

input and output

Answer 8

which is input and which is output?

Answer 9

domain is the input and the range is the output

Answer 10

alright, so the question asks us what is the domain? \[H(w)=\frac{65}{w}\]then we are looking for what is permissable for input into this function? we input w.

Answer 11

look at the function and tell me what isn't okay for w. Keep in mind, we are talking about width of a real object. What are permissable widths in this function?

Answer 12

is it w>0

Answer 13

Don't guess, answer my question. What could the width of the object be? Let's try -9.5. Can we have an object with -9.5 width?

Answer 14

no

Answer 15

I honestly think its that, it has to be greater than 0

Answer 16

think of it in terms of mathematics though. What would happen if we had w=0 in that function?

Answer 17

we've already eliminated w<0

Answer 18

but it doesnt say less than or equal to, it just says greater than

Answer 19

ignore the multiple choice answers for now, we need find the permissible values for w.

Answer 20

we know w can't be less than zero, since that won't make sense for a real object.

Answer 21

if w isn't smaller than zero, it's either zero, or bigger than zero.

Answer 22

so we need to elminate zero as a possibility.

Answer 23

what does the function tell you that lets you do this?

Answer 24

@Xeph ... you are great at explaining things!

Answer 25

thanks.

Answer 26

the H(w)?

Answer 27

\[H(w)=\frac{65}{w}\]

Answer 28

why can't w be zero?

Answer 29

because anything times 0 is zero

Answer 30

it's because when you divide by zero, everything breaks

Answer 31

simply speaking

Answer 32

same reason we found asymptotes in your last question, when the denominator was zero

Answer 33

therefore, w>0

Answer 34

thanks

Answer 35

you're welcome