If a coin is flipped 75 times, in how many ways could there be exactly two tails?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10

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