Determine the taxable amount of social security benefits for the following situations. If an amount is zero, enter "$0".
a. Erwin and Eleanor are married and file a joint tax return. They have adjusted gross income of $36,000, no tax-exempt interest, and $12,400 of Social Security benefits. As a result, $ of the Social Security benefits are taxable.
b. Assume Erwin and Eleanor have adjusted gross income of $12,000, no tax-exempt interest, and $16,000 of Social Security benefits. As a result, $ of the Social Security benefits are taxable.
c. Assume Erwin and Eleanor have adjusted gross income of $85,000, no tax-exempt interest, and $15,000 of Social Security benefits. As a result, $ of the Social Security benefits are taxable.

Suppose the government decides to issue a new savings bond that is guaranteed to double in value if you hold it for 20 years. assume you purchase a bond that costs $25. a. what is the exact rate of return you would earn if you held the bond for 20 years until it doubled in value? (do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. if you purchased the bond for $25 in 2017 at the then current interest rate of .27 percent year, how much would the bond be worth in 2027? (do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) c. in 2027, instead of cashing in the bond for its then current value, you decide to hold the bond until it doubles in face value in 2037. what annual rate of return will you earn over the last 10 years? (do not