To which subset of the real numbers does the number 1.68 belong?
a. rational numbers
b. natural numbers, whole numbers, integers, rational numbers
c. rational numbers, irrational numbers
d. none of the above

a.rational number

Step-by-step explanation:

We are given that a real  number 1.68

We have to find that given number belongs to which set

We know that

N={1,2,3...}

Whole numbers set ={0,1,2...}

Integers=Z={...-3,-2,-1,0,1,2,,,}

Rational number :That number which can be written in the form of where q is not equal to zero ,p and q are belongs to integers.

Irrational number: That number which is not rational is called irrational number.

Hence, given number 1.68 belongs to rational numbers set.

Answer : a.rational number

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step-by-step explanation:

after 1 year: 221 deer

step-by-step explanation:

30% of 170 is 51. 170+51=221