What is the length of the height RS of the roof rounded to the nearest tenth?

(picture added in a couple minutes!)

Question

What is the length of the height RS of the roof rounded to the nearest tenth? 

(picture added in a couple minutes!)

jhonyy9 · Answer

???

anonymous · Answer

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jhonyy9 · Answer

so for this you need to know the thesis of the height of a right triangle 

so you have learned it in your schoole ?

anonymous · Answer

yeah i think so lol .. i'd have to look in my notes . but this is the 2nd to the last question i need to answer then i can log off of my school .... i dont wanna do all that lol

jhonyy9 · Answer

so what said that the lenght of the height from the right angle on the opposite side squared will be equal with the product of the lenghts of shadows of this height on hypothenuse 

sorry for my english but hope so much that you will can understanding right

jhonyy9 · Answer

than PS=7

than RS^2 =PS*SQ

ok ?

anonymous · Answer

oh wait lol i forgot to post the answers i have to choose from ! lol 

a.) 9.5 inches
b.)16.1inches
c.) 16.5 inches
d.) 45.5 inches

jhonyy9 · Answer

so than will be 

RS^2 =7*13 =91
than RS=sqrt91 = 9,5 inches

so a), will be right 

ok ?

anonymous · Answer

okay thank you !

jhonyy9 · Answer

@LaynaMae sorry but i hope that you have understood it somthing from my english 

good luck

bye

anonymous · Answer

you helped a lot ! thank you

jhonyy9 · Answer

but you have understood it all right ?

was my pleasure

anonymous · Answer

yes i understood :)