Natalie likes to mail lots of postcards when she goes on holiday. In 2014 the cost of a single postcard stamp was 0.34 1. Today Natalie buys 10 postcard stamps so what is the total cost of the stamps

2. Natalie and her freinds decide to buy 100 postcard stamps what will be the total cost of the stamps now?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Someone me! if you’re smart you can solve this!

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.