Posted by Mack on Monday, August 27, 2007 at 10:03pm.
At Central Park Zoo,the ratio of sea lions to penguins is 4 to 11. If there are 84 more penguins than sea lions, how many sea lions are there?
The answer book says: C is the answer. The correct answer should yield a ratio of sea lions to Penguins of 4 to 11, so try out choice C. If there are 48 sea lions, there are 48+84=132 penguins, so the ratio of sea lions to penguins is 48/132=4/11, which is just what we want.
How did they know to pick choice C??

S.A.T Math  brie, Monday, August 27, 2007 at 10:11pm
wait:
132 penguins 4
 = 
48 sea lions 11
i don't think the 2 fractions = eachother(11 doesn't go into 48

S.A.T Math  brie, Monday, August 27, 2007 at 10:12pm
wait no im wrong ignore thelast post

S.A.T Math  brie, Monday, August 27, 2007 at 10:13pm
c IS right because 48/132=4/11:
48 divided by 4=12
132 divided by 11=12

S.A.T Math  DrBob222, Monday, August 27, 2007 at 10:42pm
right. Here is they knew to pick those numbers.
Let number sea lions = S
let number penquins = P
We know two things.
S/P = 4/11 AND
S+84=P
Two equations with two unknowns. Solve simultaneously for S and P.
S is 48 and P is 132
and 48/132 is in the ratio of 4/11

S.A.T Math  SraJMcGin, Monday, August 27, 2007 at 11:24pm
Thank you for using the Jiskha Homework Help Forum. Since you are considering the SAT Math Exam, you might like to bookmark/save the following sites:
1. www.4tests.com/exams/examdetail.asp?eid=6
2. http://www.math.com/students/testprep.html
3. http://math.rice.edu/~lanius/Geom/quiza.html
4. http://www.majortests.com/sat/mathskills.php
5. http://www.majortests.com/sat/problemsolving.php (part II)
6. http://www.algebra.com/testing/scripts/st.mpl
7. http://www.syvum.com/sat/
8. http://www.saab.org/saab_org.cgi
9. http://www.collegeboard.com/student/testing/sat/prep_one/math_review.html
Answer This Question
Related Questions
 math  The ratio of the number of male lions to female lions in the animal ...
 English  The ____ roars frightened the children. 1. lions' 2. lions 3. lion ...
 math  There are 50 big cats in the zoo. 2/5 of them are tigers. 1/5 of ...
 Art PLZ Correct ME!!  Which statement is the best comparison of the symbolism ...
 Art  Which statement is the best comparison of the symbolism behind Chinese in ...
 Art correct me!!  Which statement is the best comparison of the symbolism ...
 Math  At th zoo, there were 3 times as many monkeys as lions. Tom counted a ...
 Algebra 2  Did I solve this word problem correctly? In last week’s basketball ...
 Art  PLEASE HELP!!! And if you know all the answers to the lesson that would be...
 check geo  russian coasts lie along the pacific and artic oceans, as well as ...
More Related Questions