One more please help. For a certain company, the cost function for producing x items is C(x)=40x+150 and the revenue function for selling x items is R(x)=-0.5(x-80)^2+3,200. The maxium capacity of the company is 100 items.
The profit function P(x) is the revenue function R(x) minus the cost function C(x).
1. Assuming the company sells all that it process what is the profit function?
P(x)=
2.What is the domain of P(x)?
3.The company can choose to produce either 40 or 50 items. What is their profit for each for each case, and which level of production should they choose?
Profit for 40
Profit for 50

look a the sides they are perpendicular

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.