Marissa has $100. she has to buy 50 items to be eligible for a $100 shopping card, if she is buying 50 packs of gum for $2.05 each, will she have enough money to buy 50 items? if not, how much more money does she need?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?