Which set does 4. to?
a. intergers and irrational numbers
b. rational and natural numbers
c. rational and real numbers
d. irrational and whole numbers

Can any one me with the answers to these questions asap?

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

The measures of two supplementary angles are (2x + 10)° and (8x + 10)°. what is the measure of the larger angle? a. 16° b. 44° c. 14° d. 138°