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888 Answered Questions for the topic discrete math

Discrete Math Calculus

01/22/15

discrete calc problem with spheres

A sphere is growing at a rate proportional to the radius. At t=0 the radius is 8in and at t=30 the radius is 12in. What is the radius at t=15? I'm stumped on this one. I've worked with taking... more

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Discrete Math

11/12/14

how many ways are there to distribute seven different books among 10 people if no person is to receive more than one book?

Subject of Combinations and Permutations

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Discrete Math Math Computer Science

11/09/14

Find the smallest number k such that s(n) = O(n^k). (Big Oh)

Find the smallest number k such that s(n) = O(n^k). (Big Oh) s(n) = sqrt(n^2-1)

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Discrete Math

11/09/14

Modular exponentiation and Fermat's little theory

Calculate 314^163 mod 7 by using: a) Modular exponentiation b) Fermat's little theory

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Discrete Math

10/27/14

Please indicate whether each variable is a discrete or continuous variable?

Please indicate whether each variable is a discrete or continuous variable? Variable 1. The time it takes to shower in the morning. Variable 2. The number of trees in park... more

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Discrete Math

09/28/14

Discrete "Working Backwards" math problem

The family (Mama, Papa, and the three kids, Ed, Lisa, and Judy) were about to go on a camping vacation. They decided to take their five dogs with them, and they needed to know how many cans of dog... more

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Discrete Math Math Math Equations Mathematics

05/22/14

A={ -4 ,-3 ,-2 ,-1 ,0 ,1 ,2 ,3 ,4} R is defined on A as follows: For All (m,n) ?A,m R n ? 5 | (m^2- n^2 )

A={ -4 ,-3 ,-2 ,-1 ,0 ,1 ,2 ,3 ,4} R is defined on A as follows: For All (m,n) ∈A,m R n ⇔ 5 | (m^2- n^2 )

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Discrete Math

05/15/14

among the elements 0, 1, 2, 3...,13, 14 of Z(mod 15) please state all x for which x-1 fails to exist

among the elements 0, 1, 2, 3...,13, 14 of Z(mod 15) please state all x for which x^1 fails to exist

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Discrete Math

04/22/14

truth table for the compound proposition

¬p ∨ (r → ¬q)

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Discrete Math

04/16/14

express this statement using quantifiers

express this statement using quantifiers (there is a building on the campus of some college in the united states in which every room is painted whit

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Discrete Math Discrete Mathematics

03/19/14

Caesar cipher

. Using a Caesar cipher decrypt the following message and determine the key used. (Hint: KU is repeated , Alphabet wraps around)VJKU SWKB KU QXGT

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Discrete Math

03/18/14

Let A = { 4 , 5 , 6 , 7 , 8} and B = { 2 , 6 , 8}. Draw the arrow diagrams for P and Q such that the relationship follows : (x,y)?P means that x= y

Let A = { 4 , 5 , 6 , 7 , 8} and B = { 2 , 6 , 8}. Draw the arrow diagrams for P and Q such that the relationship follows : (x,y)∈P means that x≤ y

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Discrete Math Discrete Mathematics

03/17/14

Which relationships are true?

Which relationships are true? Hint: the List of symbols from your assigned reading will help. a) Q ⊆ Z b) Q ∪ Z = Q c) Z^+ U Q =Z

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Discrete Math Discrete Mathematics

03/17/14

im so lost

Is 2a(5a-30) divisible by 10?

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Discrete Math Discrete Mathematics

03/17/14

mathematical notation question

Write the following is mathematical notation (Hint: ∀ ∃ ) a) All students attend classesb) Some people are criminal

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Discrete Math Discrete Mathematics

03/16/14

Caesar cipher

Using a Caesar cipher decrypt the following message and determine the key used. (Hint: Only O or E can be doubled together, Alphabet wraps around)LXX MABL UHHD BL WHGXHint: Find the common letters.

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Discrete Math Discrete Mathematics

03/16/14

8-bit representation question

Using 8-bit representation compute the following sumsa) 111 + 45b) 67 + 67

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Discrete Math Discrete Mathematics

03/16/14

elements in a set???

How many elements are in the set { 3 ,4 ,3 ,5 ,2 ,8 ,4 ,5 ,8 ,9} ?

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Discrete Math Discrete Mathematics

03/16/14

verify the following statements

Verify the following statements a) 100 ≡ 5 (mod 5) b) 112 ≡ 4 (mod 7) c) 80≡ 8 (mod 2) im so lost

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Discrete Math Discrete Mathematics

03/16/14

Is 3e(2e+3) divisible by 7????

Is 3e(2e+3) divisible by 7? i know its simple but im horrible at math

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Discrete Math Discrete Mathematics

03/14/14

Given the following equations what is the corresponding T(x^? ) notation

Given the following equations what is the corresponding Θ(x^? ) notation a) ((2x-2)(2x+4))/8 b) ((2x^2-2x+2)(2x+4))/2c) ((3x^3+2x^2+4x+2)(2x^2+3x+2))/12

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Discrete Math Discrete Mathematics

03/14/14