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Mashutka [201]
4 years ago
6

Assume that we are using 0-1 integer programming model to solve a capital budgeting problem and xj = 1 if project j is selected

and xj = 0, otherwise.The constraint (x1 + x2 + x3 + x4 = 2) means that ________ out of the ________ projects must be selected
Computers and Technology
2 answers:
lana66690 [7]4 years ago
6 0

Answer: at most 2, 4

Explanation:

Lyrx [107]4 years ago
4 0

Answer:

hi your question is in complete here is the complete question

Assume that we are using 0-1 integer programming model to solve a capital budgeting problem and xj = 1 if project j is selected and xj = 0, otherwise.The constraint (x1 + x2 + x3 + x4 = 2) means that ________ out of the ________ projects must be selected

A. at most 1, 2

B. exactly 1, 2

C. exactly 2, 4

D. at least 2, 4

Answer : at least 2 , 4 ( D )

Explanation:

Given xj = 1

if project j is selected and xj = o

using the 0-1 integer programming, 0-1 variable provide selection with the value of a variable equal to 1 when another activity is selected and equal to zero if the corresponding activity is not selected .

x1 = 0 or 1 , x2 = 0 or 1 , x3 = 0 or 1 , x4 = 0 or 1

for the summation of the four projects to be 2, at least any of the two out of the four projects must be selected and summed up

hence my answer of at least 2 out of 4

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Write a function called printbackwards() that will work with a c++ string. the function will print any c++ string backwards. you
dangina [55]
Hi!

Well, this isn't exactly a question - but rather just a request. However, I'm going to attempt to try and <em>describe </em>to you how to approach this problem, instead of just writing the code for you and sending you on your way.

So, what's our general base goal here? We want to take a string into a function, and then print it out backwards. Seems simple enough!

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This would look something like <em>PrintBackwards(string baseString). </em>Inside this method, we'd have to do something so we can see each character in this string and then store it in a new string. 

I encourage you to try and tackle this on your own, but I can give you an idea. We can have a new valueless variable called reversedString, which will store our baseString but backwards.

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So our loop would look something like <em>for(int i = baseString.length; i > 0; i--) {}. 

</em>I haven't used C++ in awhile, so you'll have to find the specific syntax requirements. But with that loop, i represents the index of each character in baseString. It starts with the last index, and keeps going down in reverse.
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</em>Inside our loop, we could do something like reverseString += baseString.index(i); Again, I don't remember the specific syntax - so you'll have to do this on your own.
<em>
</em>Hopefully, this helps! =)<em>
</em>
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