Questions on Logic: Finite and infinite sets answered by real tutors!

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Logic: Finite and infinite sets

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Question 5237: Set of all leaves on a tree. {Infinite Set/Finite Set}
Click here to see answer by longjonsilver(2297)

Question 5238: Set of all trees in the world. {Infinite Set/Finite Set}
Click here to see answer by longjonsilver(2297)

Question 5241: Set of all grains of sand in the world.{Infinite Set/Finite Set}
Click here to see answer by longjonsilver(2297)

Question 5261: Set of all grains of sand in the world.{Infinite Set/Finite Set}
Click here to see answer by xcentaur(357)

Question 15768: Is ther another place value after the trillion's place ,if so name them?
Click here to see answer by pwac(251)

Question 20513: area of prism
Click here to see answer by ashleygurl92(6)

Question 26704: A very bored grocer was stacking oranges one day. She decided to stack them in a triangular pyramid. There was one orange in the top layer, three oranges in the second layer, six oranges in the third layer, and so on. Each layer except the top formed an equilateral triangle. How many oranges woluld it take her to build a pyramid 50 layers high?
Click here to see answer by venugopalramana(3286)

Question 41545: Find the sum of the following series:
1 + 1/2 + 1/3 + 1/4 + 1/9 + 1/8 + 1/27 + 1/16 + ...

I tried to use the sume of an infinite series formula, but there is no common ratio. I also tried seeing if some of the terms will cancel or add up to the same thing, but I am still not getting anywhere.
Click here to see answer by mszlmb(115)

Question 52459: Determine the most probable next term in each list of numbers.
a. -54,18,-6,2,....
b. 18,11,4,-3,...
Click here to see answer by mszlmb(115)

Question 58576: I have a parabolic shape that is shown as: y = 2x^2
I also need to graph an ellipse: (y - 2)^2/1 + x^2/4 = 1
Then, I need to decide if the parabola fits in the hole.
Click here to see answer by Nate(3495)

Question 63598: This is really a precalculas problem, I hope someone can help, I really need it.
Thanks
verify identity;
cos[/2-x]/sin[/2-x]= tan x
Click here to see answer by Nate(3495)

Question 66571: An airplane flew 4 hours with a 25 mph tail wind. The return trip against the same wind took 5 hours. Find the speed of the airplane in still air.
Click here to see answer by josmiceli(3007)

Question 71523: find the derivative of 2(pi)(r)-(2v/r^2)
Click here to see answer by bucky(1732)

Question 75589: use the following sets: U = (2,4,6,8,10,12,14)
A = (4,6,8), B = (2,6,10,12), C = (2,8,14)
Find A ∪ B
A. (4,6,8,2,6,10,12)
B. (6)
C. Null Set
D. (2,4,6,8,10,12)
Find A ∪C '
A. (4,6,8,10,12)
B. (4,6)
C. (2,4,6,8,14)
D. (8)

Find A' ∪(B∩C)
A. (2)
B. (2,10,12,14)
C. (2,4,6,8)
D. U = Univeral Set
Find n(B'∩C)
A. (8,14)
B. (2)
C. 2
D. 4
Click here to see answer by funmath(2873)

Question 75587: True or False: For any set: A ∩ A' = U where U is theUniversal Set
Click here to see answer by 303795(562)

Question 79263: what is the leghnth of the diagonal of a square with area 40.5 square inches?
Click here to see answer by stanbon(26272)

Question 80933: Assume the following statements:
P= The temperature is 70 degrees
Q= It is raining
R= There is no wind
Find the following statement in word form: Q --> (~R conjunction ~P)
A. If it is raining, then there is no wind and the temperature is 70 degrees
B. it is raining, if and onl if, there is no wind and the temperature is 70 degrees
C. It is raining, if and only if, there is no wind and the temperature is 70 degrees
D. None of the above.
Click here to see answer by funmath(2873)

Question 80931: Assume the following statements:
P= the termperature is 70 degrees
Q= It is raining
R= There is no wind
Find the following statement in symbolic form:
If there is no wind, then i is raining or the temperature is 70 degrees.
A. R --> (Q v ~P)
B. R --> (Q v P)
C. (Qv ~P) <-->
D. None of the above.
Click here to see answer by funmath(2873)

Question 84859: Check off all the sets of numbers that apply: 17.2353617 is a/an
Natural number
Whole number
Integer
Rational number
Irrational number
Real number
Click here to see answer by jim_thompson5910(13787)

Question 85338: Of Calculus I:
Prove that the limit as x approaches zero from the right of the function
"The square root of x times e to the power of the sine of pi over x"
is equal to zero.

In mathematical terms, that is
Prove
lim x->0+
Click here to see answer by bucky(1732)

Question 97340: How do I find the pattern to the sequence?
1,4,9,1,6,2,5,3,6,4,9,6,4 _,_,_,_
I would also like and explanation how to get the answer so I can explain it to my daughter.
Click here to see answer by stanbon(26272)

Question 132761: I am working on exponentaial functions and graphing. Can you help me plot the graph of the following functions?
1. f(x)=6x
2. f(x)=(1/2)^x
Click here to see answer by josmiceli(3007)

Question 146056This question is from textbook Algebra For college students
: Can anyone help me break this down so I understand it. Should it come with two answers? (1,0) for example?
|3x-5|+2=x+1
Thanks you in advanceThis question is from textbook Algebra For college students

Click here to see answer by Edwin McCravy(2922)

Question 146055This question is from textbook Algebra For college students
: Can anyone help this make sense, please?
|8x-17|<_24 (I guess that is<=24 but I'm not sure how to write that)This question is from textbook Algebra For college students

Click here to see answer by nerdybill(2446)

Question 148057: If n(A) = 22, n(B) = 13, nd n(A∩B) = 6 then n(A U B)=

Click here to see answer by nabla(412)

Question 148054: A revenue function is R(x)=22x and a cost function is C(x)= -9x + 341. The break-even point is:
a. (17, 374)
b. (242, 9)
c. (11, 242)
d. (31.5, 661.5)
Click here to see answer by nabla(412)

Question 148056: The sample space of an experiment is:
{A, B, C, D} AND P(A) = 0.1, P(B) = 0.3, P(C) = 0.4, P({A,C})=
Click here to see answer by stanbon(26272)

Question 148074: For two sets E and F n(E) = 30, n(F) = 25, and n(E∩F) =6
P(E|F)=
a. 25/30
b. 6/25
c. 6/30
d. 6/55
Click here to see answer by oscargut(682)

Question 148071: {x|x is a letter of the word SEEDED} ∩ {x|x is a letter of the word DRESSED}=
a. {S, E, D}
b. {D, R, S}
c. {D, R, E, S}
d. {E}
Click here to see answer by oscargut(682)

Question 148078: Select the point which is in the feasible region of the system of inequalities.

4x + y ≤ 8
2x + 5y ≤ 18
x ≥ 0, y ≥ 0
a. (2,4)
b. (-1,2)
c. (1,3)
d. (4,1)

Click here to see answer by stanbon(26272)

Question 148089: If n(A) = 22, n(B) = 13, nd n(A ∩B) = 6 then n(A U B)=
a. 35
b. 28
c. 29
d. 27

Click here to see answer by stanbon(26272)

Question 148090: The equation of the line through (8,6) and (2,) is
a. 5x-3y=22
b. 3/5x + 8/5
c. 3x + 4y = 48
d. -4x + 2y = -16
There is no y coordinate to go with (2,). This is a test question and this is how it was written by the teacher. Could you please help me!

Click here to see answer by stanbon(26272)

Question 148077: The minimum value of z = 5x + 15y, subject to:
4x + 3y ≥ 72
6x + 10y ≤ 174
x ≥ 0, y ≥ 0
occurs at:
a. (0, 17.4)
b. (9, 12)
c. (18, 0)
d. (29,0)

Click here to see answer by oscargut(682)

Question 148088: The maximum value of z = 20x + 8y subject to:
3x + y ≤ 24
6x + 4y ≤ 66
x ≥ 0, y ≥ 0
a. 220
b. 160
c. 172
d. 132
Click here to see answer by nabla(412)

Question 150040: If an earthquake measured 5.9 on the richter scale, what was the intensity of the earthquake? Neeed to use the formula M=log(A/Ao).
Click here to see answer by stanbon(26272)

Question 151943: Why is the set of natural numbers an infinite set but the set of blades of grass outside your yard a finite set?
Click here to see answer by stanbon(26272)

Question 159794: a lady started a chain letter by writing to 4 friends and requesting them to copy the letter and send it to four other friends. if the chain was unbroken until the 5th set of letters were mailed, how much was spent for postage at $8 per letter?
Click here to see answer by checkley77(7049)

Question 169020: For sets A and B, determine whether A = B, A is a subset of B, or B is a subset of A

A = { x| x є N and 13 < x < 18}
B = { 12, 13, 14, 15, 16, 17, 18}

Click here to see answer by jim_thompson5910(13787)

Question 169019: Express the following in set builder notation:
Z = {2, 3, 4, 5, 6, 7, 8, 9, 10}

Click here to see answer by jim_thompson5910(13787)

Question 169018: Write the following in roster form:
Set N is the set of natural numbers between ten and sixteen.

Click here to see answer by jim_thompson5910(13787)

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