Homework Help: math

Posted by Taylor on Monday, April 16, 2012 at 5:44pm.

last thing i promise ok the length of the wing of a model airplane is 3 in. if th escale of the model to the actual plane is 1in=25ft wha tis the length of the actual wing? is it 8.3 or 0.12

math - Ms. Sue, Monday, April 16, 2012 at 5:58pm
Neither of those.

Think about it if the model wing is 3 inches long, the actual wing must be much longer than 25 feet.

Try again.
math - Taylor, Monday, April 16, 2012 at 6:01pm
is it 0.12 can u help me
math - Ms. Sue, Monday, April 16, 2012 at 6:02pm
Use this proportion:

1/25 = 3/x
math - Taylor, Monday, April 16, 2012 at 6:09pm
so its 0.12 right can you u just go thorough it with steps
math - Taylor, Monday, April 16, 2012 at 6:16pm
hello
math - Ms. Sue, Monday, April 16, 2012 at 6:17pm
No.

Cross multiply and solve for x.

http://www.purplemath.com/modules/ratio4.htm
math - Taylor, Monday, April 16, 2012 at 6:37pm
so is it 75
math - Ms. Sue, Monday, April 16, 2012 at 6:49pm
Yay! You've got it! :-)

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