Question

* I will fan & medal! xoxo. * :D

The staff at the community center make a rectangular ice skating rink every year. They use 140 meters of boarding to enclose it. So the area of the rink depends upon the width undefined chooses. This rule describes how the area depends on the width, w:
w(70 ??? w) or 70w ??? w^2

Width | Area
10 | 600
15 | 825
20 | 1000
25 | ?

The table shows some of the values for this function. Help complete the able. If the width is 25 metes, what will the area be?

<3

Answer 1

*table

Answer 2

I am sturggling to understand the rule they are going by...

Answer 3

@SolomonZelman

Answer 4

Well, if you know that the width is 25 meters, then use:
A=l•w

You know that P=2(l+w)
So you can use that to find the length.
140=2(l+25)

solve for length

Answer 5

So find l, and then the Area

Answer 6

l = 45

Answer 7

Yes, correct

Answer 8

And then:
A=w•l
A=25•45
A=?

Answer 9

1,125?

Answer 10

I don't have a calc. so lets do that....
25•45=
25•(25+20)=
25•25+25•20=
625+500=
1125.

Yes:)

Answer 11

Yay! thank you :) <3

Answer 12

I like practicing every technique that I can encounter while doing a question, this is why I have done what I did just now....

Answer 13

By the way, in Russia for example as long as other Ueropean countries, when you use a comma you indicate a decimal so I try to use space (source: from Engineering).

Answer 14

e.g \(1{\tiny~~}125\)

Answer 15

in any case, i know you meant a thousand, tho'

Answer 16

Oh I see! Thank you for informing me! ^_^

Answer 17

Don't worry about it tho now:)
You are welcome, and good luck!

Answer 18

agree with the above just wanted to add the function
A = (70 - w)w

Answer 19

Yes, that is true:)

Answer 20

By the way good choice of meters, as they are the "SI Units"... don't want to overwhelm on the same question tho'..... cu