An epidemiologist wishes to study the factors which might contribute to heart disease. They ask doctors to provide biometric data on patients recently diagnosed with heart disease as well as data on patients who have not been diagnosed with heart disease. Is this an example of an observational study or an experiment? What are some possible sources of error? State at least two.

do you have the measurements?

the anwser is d) 75°

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).

$649.60

step-by-step explanation: