Answer:
75000
Step-by-step explanation:
We can use ratios to solve. Put the scale length over the real length
1 15
------------ = ----------------
5000 x
Using cross products
1x = 15*5000
x =75000
Answer:
C
Step-by-step explanation:
Find area of all trinagles and subtract that by total area of square.
I suppose <em>K</em> is the matrix
To compute det(<em>K</em>), you can use a simple cofactor expansion along the first row: