Marcy played the piano for 45 minutes. she stopped playing at 4: 15 p. m. at what time did she start playing the piano?

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?

Solve the formula ax+ by = c for x.

In september, louise planted a tree. every month, the tree louise planted grew 2 inches. what would the constant of proportionality of the line be?