Zen wants to fill a window box with soil. The length of the window box is 5 feet, width is 6 inches, and height is 9 inches. Each bag of soil contains 0.625 cubic foot of soil. How many bags of soil will Zen need to fill the window box completely?

[1 foot = 12 inches]

Question

Zen wants to fill a window box with soil. The length of the window box is 5 feet, width is 6 inches, and height is 9 inches. Each bag of soil contains 0.625 cubic foot of soil. How many bags of soil will Zen need to fill the window box completely?

[1 foot = 12 inches]

undeadknight26 · Answer

@agent0smith please help me.

jigglypuff314 · Answer

volume of box = (length) (width) (height)
                      =  5 * 6 * 9
                      =  270
how many  bags of  0.625 can go into  270?
270/0.625 =

undeadknight26 · Answer

the answer is 432?

jigglypuff314 · Answer

That's what I got :)

undeadknight26 · Answer

Can u help me with 1 more?

The equation below shows the perimeter f(x) of several rectangular paintings having width x inches:

f(x) = 40 + 2x

The perimeter of each painting is less than 92 inches. Which of the following best describes the domain of f(x)?

 All real numbers greater than 0 and less than 26

 All real numbers greater than 0 and less than 92

 All integers greater than 0 and less than 26

 All integers greater than 0 and less than 92
i thought this was c...

jigglypuff314 · Answer

0 < x < 26  part I know for sure is correct :)
idk if it ever said it had to be integers?

undeadknight26 · Answer

I dunno this is the whole question.

jigglypuff314 · Answer

well if the width can be something like half an inch, then A
if not then C would be correct.

undeadknight26 · Answer

I dunno.

phi · Answer

For your posted question, you have to use the same units.

a box 5 feet long and width 6 inches and height 9 inches does not mean a volume
of 5*6*9  
(5*6*9 is what you do if the sides were 5 ft, 6 ft and 9 ft)

jigglypuff314 · Answer

hi phi :)
we were discussing this one:
The equation below shows the perimeter f(x) of several rectangular paintings having width x inches:
f(x) = 40 + 2x
The perimeter of each painting is less than 92 inches. Which of the following best describes the domain of f(x)?

phi · Answer

which is why they bother to mention (hint, hint)  12 inches is 1 foot.

jigglypuff314 · Answer

oh right! I hadn't read properly >,< thanks phi!

phi · Answer

For
***
The equation below shows the perimeter f(x) of several rectangular paintings having width x inches:

f(x) = 40 + 2x
***

the domain are the legal x value.
x is the width.  It seems you must have a width bigger than zero
so 0 < x
is a good start.

they say the max perimeter ( f(x) )  is less than 92
so you know f(x) < 92
replace f(x) with 40+2x and simplify
40+2x < 92
2x < 52
x < 26

so it looks like
0 < x < 26

phi · Answer

There is no reason the width *has* to be integer.  (We are not counting coins or eggs, we are measuring a distance)

undeadknight26 · Answer

so that means it is C?

jigglypuff314 · Answer

all real numbers
so A

undeadknight26 · Answer

oh okay thx :D

jigglypuff314 · Answer

and I messed up the question before...

jigglypuff314 · Answer

if was 
6in = 0.5 ft
9in = 0.75ft
so  5 * 0.5 * 0.75 = ___ / 0.625 =

undeadknight26 · Answer

ohhhhh ok...let me jot that down.