52. We use as many quarters (25 cents) as we can, then dimes (10 cents), nickels (5 cents) and pennies (1 cent)

a)

89 cents 3 quarters

89 mod 25 = 14 cents 1 dimes

14 mod 10 = 4 cents 0 nickel

4 cents 4 pennies

b)

49 cents 1 quarter

49 mod 25 = 24 cents 2 dimes

24 mod 10 = 4 cents 0 nickel

4 cents 4 pennies

c)

99 cents 3 quarters

99 mod 25 = 24 cents 2 dimes

24 mod 10 = 4 cents 0 nickel

4 cents 4 pennies

d)

33 cents 1 quarter

33 mod 25 = 8 cents 0 dime

8 cents 1 nickel

8 mod 5 = 3 cents 3 pennies