The expression ln(3xy) can be expressed correctly as: select one: a. ln(3) + ln(x) + ln(y) b. ln[(xy)3] c. ln(3x) - ln(y) d. ln(3x)y (incorrect)

B. In [(xy)3]  hope this helps                                          

On monday,mrs.wise bought 3 lbs of apples at $4per lb= 4*3=$12on tuesday ,20%off and she buy 5 lbs of apples = $4-20%=3.20*5lb=$16example: other wise when she buy 5lbs on monday she have to spend 4*5=20