Identify all the sets to which the number 3.1214122144 . . belongs.

a)rational number
b)irrational number
c)integer, rational number
d)whole number, integer, rational number

The answer is (B) Irrational number.

Step-by-step explanation: The given number is 3.1214122144 . . .. We are to check out of the given options all the sets to which the given number belongs.

The given number is in decimal form, so it cannot be an integer or a whole number.

Also, the digits after the decimal are non-repeating and non-terminating. This is the property of irrational numbers. In rationals, either the digits after the decimal are terminating or they are repeating. Therefore, the given number is irrational.

Thus, the correct option is (B) Irrational number.

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls