Math Problem Solving

Question

The mint currently makes about 30 million pennies a day. How many is this per second? (Round your answer to the nearest penny.) How many per year?

Answer 1

30 million = 30,000,000 = 30 x 10^6 = 3 x 10^7

divide by

60x60x24 = 86,400= 8.64 x10^4

3 x 10^7/8.64x10^4

= 3/8.64 x 10^3

=.347222... x 10^3

= 347.222... pennies per second

= 347 2/9 pennies per second

= 347 pennies per second, rounded to nearest penny

30 million per day

3 x 10^7 per day

3 x 365.25 x 10^7 per year

= 1095.75 x 10^7

= 1.09575 x 10^10

= 10,957,500,000 pennies per year

= about 11 billion pennies per year