# who can help me thanks Maths problems?

Dec 21st, 2014
Anonymous
Category:
Mathematics
Price: \$5 USD

Question description

If L = MN, what is the percentage increase in L if M increases by 15% and N increases by 20% ??

hello, im studying out of collegeboard's SAT test prep book, and i came across a math problem that I don't understand how to solve... it only provides the answer

If 18√18 = r√t , where r and t are positive integers and r > t, which of the following could be the value of rt?
a) 18
b) 36
c) 108
d) 162
e) 324

The answer is C but I dont get how... because it all makes sense to do 18 x √18(which is around 4.24) = 76.32 because 18 > √18..?? or 36 x √36 (6) = 216 ?

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