Let's say, the number is "a"
thus

cross-multiply and solve for "a"
Answer:
.......C........
Step-by-step explanation:
......
If you vandalize my property I will call the cops.
Answer:
96 cm^2
Step-by-step explanation:
Total Surface Area of a square pyramid:
A = L + B = a2 + a√(a2 + 4h2))
A = a(a + √(a2 + 4h2))
You will have to multiply 600 by 15%
600 x 0.15 = 90
600 + 90 = 690 Euro