NEED HELP ASAP!! the measure of the angle BDC is. and the measure of angle ADB is..

On a piece of paper graph f(x)=5•(0.4)^x

Twelve less than a number is at most 20

An internet company charges $8.95 per month for the first 3 months that it hosts your web site. then the company charges $11.95 per month for web hosting. how much money, in dollars, will the company charge for 8 months of web hosting?