Which of the following statements is a tautology and why is it that right answer a. integers are rational numbers. b. whole numbers are natural numbers. c. rational numbers are irrational. d. irrational numbers are integers.

Well, we know that N ⊂ Z ⊂ Q ⊂ R

This means that the naturals are included in the integers, the integers (and the naturals) are included in the rationals, and the rationals are included in the reals.

Then, A is a tautology.

B is false, because the 0 is not a natural number,

C is false, because the irrational numbers are the complement of the rational numbers.

D you can see that the integers are irrationals, but not all irrationals are integers, so this also is false.

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval

6e14 is the answer.