34. Try the answers and see which one works.
For n=1,
F gives 2 (wrong)
G gives 2 (wrong)
H gives 1 (so far, so good)
J gives 1 (so far, so good)
For n=3,
H gives 2*3 -1 = 5 (wrong)
J gives 2³ - 1 = 7 (right)
The appropriate choice is
J [tex]2^{n}-1[/tex]
35. Consider the profit Anna makes on each plate. It is the difference between her selling price and her cost:
$25 -10 = $15
If Anna makes $15 on each plate she must sell $750/$15 = 50 plates in order to cover her weekly expenses. That is, 50 × $15 = $750.
Before she can make a profit, Anna must sell this number of plates each week
C 50
