Answer:

Step-by-step explanation:
Let the three sides be a, b and c respectively.
Such that:



Required
Determine the area
This is calculated as:

Where

Substitute values for a, b and c



Substitute values for a, b, c and s in




-- Approximated
Answer:
9 dollars
Step-by-step explanation:
Since 6 is 2/3 of the total price, and half of 6 is 3, add three to 6 and you get 9.
Answer:
A:10B: 
Step-by-step explanation:
[] Let A be Amy, B be Bill, and C is Cara.
-> Amy's score was ten times Bill's score
A * 10 = B or 10A = B
-> Cara's score was half of Amy's score
C = A *
or C = 
[] The ratio is A to B to C because it asks for Amy to Bill to Cara. We can use our numbers from above to solve. This problem seems to revolve around Amy, so she can be set to A.
-> A = A
-> B = 10A
-> C = 
A:10B: 
Have a nice day! <em>- hopefully this is correct, different math classes look for different things.</em>
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.
- Heather