College algebra help?

1.

A. The set of natural numbers less than 5000

is of course finite: from 0 to 5000,

there are 5001 numbers.

B. The set of all whole numbers less than 5,000,000.

"whole numbers" and naturals numbers have

the same meaning: the set is finite: 5,000,001 numbers.

C. The set of rational numbers less than 50.

the numbers of numbers under the form p/q

is infinite.

D. The set of integers between -20 and 20

is finite:

20 numbers from -20 to -1 plus 0 plus

20 numbers from 1 to 20

so 41 numbers.

the set in answer C is the only infinite set.

2. D. II III and IV

in answer I,

the next toss in independent from

the tosses you've before.

But for II, III, and IV,

something have been removed

so the conditions are not the same as

the conditions of a draw without removing

a card, a candy, etc.

3. x = (a + b)/2

or x = a + b/2

4.

10-10/( (2² x 3) = 10 - 12/(4 x3)

= 10 -12/12 = 10 - 1 = 9

hope it'll help !!

rational numbers include any number that you can write in exact form. For example, -10,000 is rational, but π is not. So rational numbers extend from negative infinity to positive infinity. So the number of rational numbers less than 50 is ( infinity - 0 + 49), which is infinity.

2

I is independant. No matter how many times you flip a coin, none of the previous results will affect the next.

3

x = (a + b) / 2

2x = a + b

2x - b = a

4

(2^2X3)

I don't know what this means. Is this:

2^(2)x^3

2^(2)x*3

2^(2x*3)

2^(2*3)