Question

The area of a rectangle is the product of width and length. If a rectangle has length 15m sqrt 13m and width sqrt 9m, which of the following is the area of the rectangle?
135m2 sqrt 13

135m sqrt 13m

45m2 sqrt 13

45m sqrt 13m

Answer 1

help please

Answer 2

so it has length \[15m \sqrt{13m}\]
and width
\[\sqrt{9}\]

Answer 3

?

Answer 4

yes @JamesWolf

Answer 5

what are you struggling with, the formula or the operation of multiplying it all?

Answer 6

multiplication of it all, what to do with the radical?

Answer 7

leave it, your answers are in the form of (some number) x (some radical)

Answer 8

so for example \[25\sqrt{42} \times 4 = 100\sqrt{42}\]

Answer 9

so 15m sqrt 117m?

Answer 10

15m \[\sqrt{117m}\]

Answer 11

well you can actually square root the 9. \[\sqrt{9} = 3\]

Answer 12

which gives you \[15m \sqrt{13m} \times 3m = area\] =

Answer 13

so 45m \[\sqrt{13m}\] ?

Answer 14

or is something squared?

Answer 15

yeah right on! but remember that your timesing the "m" too so you get \[45 m^{2}\sqrt{13m}\]

Answer 16

and im almost certain "timesing" isnt a word

Answer 17

thank you!

Answer 18

no problem :)