Every day Maria spent 30 minutes reading and 20 minutes playing the piano witch equation shows the total number of minutes, m she plays the piano in d days

The graph below could be the graph of which exponential function?

Suppose that in 2008 , 840,800 citizens died of a certain disease assuming the population of teh country is 399 miliion, what is the mortality rate in units of deaths per 100,000 people?

The sum of five and a number n is at least 12