He product of 3 and a number, divided by 9

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

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921