Which of the following gives all of the sets that contain -1/2?

a. the set of all rational numbers and the set of all real numbers
b. the set of all natural numbers and the set of all irrational numbers
c. the set of all integers and the set of rational numbers
d. the set of all natural numbers, the set of rational numbers, and the set of all real numbers

Option A is Correct Option.

Step-by-step explanation:

Given:

 is a rational no.

Option A:

Given no is a rational no.

⇒ Both Set of rational no and real nos. contain rational nos..

Thus, Correct Option.

Option B:

set of natural nos and irrational nos does not contain rational nos.

Thus, Not correct option.

Option C:

Set of integers does not contain rational numbers.

Thus, Incorrect Option.

Option D:

Set of all Natural Nos. does not contain rational nos.

Thus, This option is not correct option

Therefore, Option A is Correct Option.

10.416 m/s

step-by-step explantion:

distance=100m

time= 9.6s

average speed=100/9.6

=10.416 m/s