Question

heres my problem..i have the answer and the example shows to put it in square root form but then says round to the nearest 100th. that's where im lost. A 15ft ladder is places against a verticle wall of a building with the bottom of the ladder standing level ground 14ft from the base of the building. how high up the wall does the ladder reach. I got 29. how do I do the square root of 29 rounded to the nearest 100th???

Answer 1

by hand or by calculator ....

Answer 2

is my answer 29 right? I tried and do it with a program I have on my computer but it only gives me the answer square root 29

Answer 3

the set up for (x+y)^2 is x^2 +2xy + y^2, so lets find an x^2 to start with


----------
/29 . 00 00

5^2 = 25, 6^2 = 36 ... lets use 5


5
----------
/29 . 00 00
25
-----
4 00

now all we need to determine is 2xy + y^2, that equals 400, x=5 sooo, lets double the 5 and take on a y


5
----------
/29 . 00 00
25
-----
10_/ 4 00 , 4 is to big, lets try 3




5 . 3
----------
/29 . 00 00
25
-----
103/ 4 00
3 09
------
91 00


double the new x and find a y

5 . 3
----------
/29 . 00 00
25
-----
103/ 4 00
3 09
------
109_/ 91 00 , looks like 8 might work



5 . 3 8
----------
/29 . 00 00
25
-----
103/ 4 00
3 09
------
1098/ 91 00
87 84
------
3 16 ... just need one more to rnd eh

Answer 4

by calculator we get sqrt(29)= 5.38516480713

Answer 5

how did you do it by calculator?

Answer 6

depends on the calculator .... you need one that can do exponents, or has a sqrt button

Answer 7

otherwise i just used google

https://www.google.com/search?q=sqrt(29)&oq=sqrt(29)&aqs=chrome.0.69i57j0j69i62l3.7794j0&sourceid=chrome&ie=UTF-8#q=sqrt(29)

Answer 8

ok what would 27 be?

Answer 9

https://www.google.com/search?q=sqrt(27)&oq=sqrt(27)&aqs=chrome.0.69i57j0j69i62l3.3121j0&sourceid=chrome&ie=UTF-8

Answer 10

this e gets on my nerves. its sooo slow. ok I sent a message as well it shows the answer as 5.19615 so rounding to nearest 100th would that be 5.29