At a certain zoo, the ratio of sea lions to giraffes is 7 to 11. If there are 81 more giraffes than sea lions at the zoo, how many sea lions are there?	Choose the correct option:	A) 24	B) 36	C) 48	D) 72	E) 141
7/11 = x / x+81   7*81 = 4x   x=141   E. 141
<result>E</result>
At a certain zoo, the ratio of sea lions to giraffes is 7 to 11. If there are 81 more giraffes than sea lions at the zoo, how many sea lions are there?