Suppose you have 40 coins in your pocket, consisting only of pennies and nickels. The total value of the coins is $0.80. Let p represent the number of pennies and n represent the number of nickels that you have in your pocket. The equation representing this scenario is:
a) $0.01p + $0.05n = $0.80
b) $0.01p + $0.05n = $0.40
c) $0.01p + $0.10n = $0.80
d) $0.01p + $0.10n = $0.40