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Pavel [41]
3 years ago
12

Nico wanted to determine the number of students in his school who buy school lunch he walked around the cafeteria one lunch peri

od looking to see weather every fifth person in the cafeteria purchased lunch or brought their own
Mathematics
2 answers:
Lemur [1.5K]3 years ago
7 0

Answer:

D. Observational study

Step-by-step explanation:

We are given that Nico looked around the cafeteria during the lunch to see whether people purchased lunch or brought their own.

It is known that:

1. 'Survey' means to question a wide variety of population about their views on a particular issue.

2. 'Simulation' refers to act out a situation or process in order to find some conclusions.

3. 'Experiment' represent a scientific procedure undertaken in demonstrate a fact or test a hypothesis.

4. 'Observational study' is to study the samples without the variables being under the control of the observer.

nalin [4]3 years ago
4 0
I'm pretty sure the answer is D observational study.

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An aircraft manufacturer wants to determine the best selling price for a new airplane. The company estimates that the initial co
Ad libitum [116K]

Answer:

The cost function is simply the initial cost plus the manufacturing cost.

C(x)=500+20x-5x^3/4+0.01x^2

The demand function was given to us.

p(x)=320-7,7x

The revenue function is simply x multiplied by the demand function.

R(x)=xp(x)=320x-7.7x^2

We find that when 20 planes are produced, that profit is currently maximized

We know that to maximize profit, marginal revenue must equal marginal cost.

C'(x)=20-15/4x^-1/4+0.02x

R'(x)=320-15.4x

x=19,57

We find that when 20 planes are produced, that profit is currently maximized.

Step-by-step explanation:

An aircraft manufacturer wants to determine the best selling price for a new airplane. The company estimates that the initial cost of designing the airplane and setting up the factories in which to build it will be 500 million dollars. The additional cost of manufacturing each plane can be modeled by the function: , where x is the number of aircraft produced and m is the manufacturing cost, in millions of dollars. The company estimates that if it charges a price p (in millions of dollars) for each plane, it will be able to sell  planes.

(a) Find the cost, demand, and revenue functions.

(b) Find th eproduction level and the associated selling price of the aircraft that maximizes profit.

3 0
3 years ago
What is 372 rounded to the nearest 100
Xelga [282]
372

The number 3 is in the hundreds place.

Look to the number immediately to the right.

We know that 7 is bigger than 3.

So, we add 1 to 3 and the rest become 0.

Answer: 400
7 0
3 years ago
Read 2 more answers
Divide the following polynomials, then place the answer in the proper location on the grid. Write the answer in descending power
balandron [24]
By synthetic division, the quotient (4x^2 -10x -24)/(2x +3) is 2x -8.

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You have not actually said what division you want performed.

4 0
3 years ago
Read 2 more answers
11.REINFORCE The lengths of three sides of a triangle are 2x, 3x - 4, and x+4. Find a value of x that makes the triangle equilat
mash [69]

Answer:

x=4

Step-by-step explanation:

It suffices to equate any two sides and then check whether the solution is valid for the third side.

Taking 2x and 3x-4 and equating:

2x = 3x-4

x = 4

This means the sides are both of length 8. Now check whether for x=4 the third side is also of length 8:

x+4=4+4=8

which indeed works out confirming x=4 being a valid solution

5 0
3 years ago
Can you please help me?
eduard

Answer:

sorry can't help didn't understand

3 0
2 years ago
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