Iwant to know the answered to b and c for b i got 1673831.16 and double checked my work but seems like it’s wrong and for c i thought it would be either 67 or 68 but it’s not

Unc special program for high school students that pays them three $300 for joining and an additional $200 per week h& m pay students in according to the function y equals 300+240 x where why is the total paint and x is the number of weeks but love your peas students according to this graph primark uses the pay schedule according to the following table which stores pay has the greatest rate of change

Select the sequences that are geometric.

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?