This is a 30-60-90 triangle. The short leg is given to us as 5
The long leg is equal to sqrt(3) times the short leg
long leg = sqrt(3)*(short leg)
long leg = sqrt(3)*5
long leg = 5*sqrt(3)
The base is 5. The height is 5*sqrt(3)
b = 5
h = 5*sqrt(3)
Use this to find the area
A = b*h/2
A = 5*5*sqrt(3)/2
A = 25*sqrt(3)/2
which is the exact area in terms of a radical
You can write it out as
The only solution for

is

, so it's either

or

.
Both

and

are equal to 1, so the answer is

.
Answer: 180 customers
Explanation: To find the amount of people that made additional purchases you convert 72% into a decimal (0.72). you then take this decimal and multiply it by 250 to get an answer of 180