A premedical student at a local university was complaining she just paid $158.60 for her anatomy book after a 9% discount on the cost of the book. What was the price of the anatomy book before the discount? Round to the nearest cent. Please explain on how you got the answer.

.91 * x = 158.6

x = 158.6/.91  = $174.29

Step-by-step explanation:

p ÷ r = tan(x)

step-by-step explanation:

given that there is a figure below shows a right triangle: a right triangle is shown with hypotenuse equal to q units and the length of the legs equal to p units and r units.

graph is missing so i will create the graph as per given information.

the angle between the legs having lengths p units and q units is y degrees. the angle between the legs having lengths r units and q units is x degrees.

now we need to find about what is p ÷ r equal to.

so we can use trigonometric ratio tan(x)=[altitude]/[base] to find the value of p ÷ r, because p is the altitude and r is the base.

p ÷ r=tan(x)

hence final answer is p ÷ r=tan(x).