It cost $45 to produce 2 calculators and $143 to produce 4 and $869 to produce 10 how much does it cost to produce 7 calculators

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.