PLS HELP, I NEED AN ANSWERR

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Which word in the sentence below is an interrogative pronoun? who is picking us up from school? whousisfrom

Acredit union pays 5% annual interest, compounded daily, on saving deposits. find the value after one year of $500 deposited in this account. a-$20.40 b-$25.64 c-$520.40 d-$525.64