Can anyone help me with some Algebra 2 problems?

It's been awhile since algebra for me, but I still could remember how to do the easy ones like #2 and #3.

#2.
(x)(2x) = 128
2x^2= 128
x^2=64
x=8
Length = 16cm
Width = 8cm

#3 (This one is easier to show you if I write on paper. Write it on paper if you have trouble following.)

224 feet/ 1 sec = 528 feet / x

Feets cancel out eachother.

224/1 sec = 528/x

Cross

224x = 528 sec
x = 528/224 sec
x = 2.357 seconds (if your teacher wants the answer in decimals)


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I wish I could help you... but all of that made my brain hurt. =/