Answer:
A
Step-by-step explanation:
Steps to take to determine the answer
- Because the length is in yards, it has to be converted to foot
- Find the area of the patio using the length and width measured in foot
- Determine the area of the square brick
- Multiply the cost of the brick by the area
1 yards = 3 foot
5 x 3 = 15 foot
Area of a rectangle = length x breadth
15 x 10 = 150 ft^2
Cost = 150 x 4 = $600
4th option because you use the pythagorean theorem so 16^2 - 7.4^2= 201.24
which equals approx 14.19
so the ODE is indeed exact and there is a solution of the form 
. We have
With 
, we have
so
