Some companies who make those annoying phone calls to try to sell you something generate the phone numbers randomly. Given that ten-digit phone numbers NNN-NNN- can't have a 0, 1, or 9 as the first digit nor can it have 1 or 9 as the second digit. How many different phone numbers are possible?

The difference between tax advoidance and tax evasion

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

How do you solve a question like this?