Final answer:
Beth's biweekly salary last year was $1,475. Her biweekly salary this year is $1,787. As a result of her promotion, Beth earns $312 more on a biweekly basis.
Step-by-step explanation:
a) To find Beth's biweekly salary last year, we need to divide her annual salary by the number of biweekly periods in a year. One year consists of 52 weeks, and since she is paid biweekly, there are 26 periods. So, her biweekly salary last year was $38,350 / 26 = $1,475.
b) To find Beth's biweekly salary this year, we can apply the same calculation. Her annual salary this year is $46,462. So, her biweekly salary this year is $46,462 / 26 = $1,787.
c) To determine how much more Beth earns on a biweekly basis as a result of her promotion, we subtract her biweekly salary last year from her biweekly salary this year. The difference is $1,787 - $1,475 = $312.