In a different plan for area codes, the first digit could be any number from 0 through 6, the second digit was either 0,1, or 2,and the third digit could be any number except 6. With this plan how many different area codes are possible?

The gades foundation and hbm corporation are eager to donate generously to their favorite charities. the gades foundation donated $250 in the first month, and each month afterward their cumulative donation total increases by 100$ the hbm corporation donated $64, in the first month, and each month afterward their cumulative donation total increases by 75%. in which month will the hbm corporation's cumulative donation total first exceed the gades foundations' cumulative donation total?

Heather is a cashier. she can ring up 1212 customers in 99 minutes. at this rate, how many minutes does it take her to ring up 44 customers?

What is the domain of the step function f(x)=[2x]-1?