What is the missing step in this proof? a. statement: slope of `bar(df)` = slope of `bar(bc)` reason: definition of slope b. statement: slope of `bar(df)` = slope of `bar(bc)` reason: transitive property of equality c. statement: df = bc reason: corresponding sides of congruent triangles are congruent. d. statement: `delta`adf ~=`delta`abc reason: asa

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?