Answer:
$39,500
Explanation:
In order to find the total cost, we proceed as follows:
1)
First, the base fee is:

2)
Then we calculate the total number of questions: we have 15 questions per survey, and a total of 500 surveys (for 500 people), therefore the total number of questions is

Since the cost is $5 per question, the total cost of the questions is

3)
Finally, we have 500 persons, and there is a cost of $2 per each person, so the cost due to this is

Therefore, the total cost is:

Answer:
An arduino is just a micro controller. It has a programmable CPU and a memory storage. There're plenty of other microcontrollers out there that does the same thing like the NodeMCU or the Teensy 3. A quick google search should reveal alot more alternatives.
You can pretty much program the arduino using any language. The only thing is that had someone made a compiler to translate the code into the 1's and 0's that can be read by the arduino yet.
As for manufacturing, I think they use their own custom made controller. I haven't seen a company that used an arduino yet.
Answer:
Overall ideal mechanical advantage of the machine = 40
Explanation:
Given:
Ideal mechanical advantage of three machine = 2, 4, 5
Find:
Overall ideal mechanical advantage of the machine
Computation:
Overall ideal mechanical advantage of the machine = 2 × 4× 5
Overall ideal mechanical advantage of the machine = 40