Answer:
11.7947881
depends now how you wanna round it
Step-by-step explanation:
tan(25)=5.5/x
x=5.5/tan(25)
x=11.7947881
this is how we round it in my school
x≈11.8
Answer:
50.24 units^2
Step-by-step explanation:
Area of circle formula:
r^2
r = 4,
= 3.14
3.14 * (4^2) = 3.14 * 16 = 50.24
Answer:15
Step-by-step explanation:
Given
Craftsman sell 10 Jewelry set for $500 each
For each additional set he will decrease the price by $ 25
Suppose he sells n set over 10 set
Earning
Earning 

differentiate to get the maximum value

Equate
to get maximum value



Thus must sell 5 extra set to maximize its earnings.
Since all sides of the square are equal, therefore area of square can be calculated using the following rule:
area of square = side^2
200 = (side length)^2
therefore,
the length of each side is sqrt(200) = 14.14 ft