Alexander uses cupric chloride to etch circuit boards. He recorded the room temperature, in °C, and the um
etching rate, in of the cupric chloride.
min
After plotting his results, Alexander noticed that the relationship between the two variables was fairly
linear, so he used the data to calculate the following least squares regression equation for predicting the
etching rate from the room temperature:
1
9 =21
+
What is the residual if the room temperature was 25 C and the cupric chloride had an etching rate of
um
5 ?
min

on friday there were 15 birds

step-by-step explanation:

my butt

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).

10

step-by-step explanation: