This can be solved by similar triangles, which means you can cross multiply and divide. 78/195=x/10. 78(10)=780 and divide 780 by 195, you'll get the answer is 4. This means Sarah is 4 ft tall.
Recall that for integers <em>n</em> > -1,

Then

ANSWER
Yes, the two expressions are equivalent.
The identity property of multiplication.
EXPLANATION
The identity element for multiplication of real numbers is 1.
This means that, if you multiply any real number by 1, you get the same real number
The given expression is,

These two expressions are equivalent.
The property that is applied is the identity property of multiplication.
6 because if you multiply (3/5)2 you get 6