Find the period and the amplitude of the periodic function. i'm awful with graphs : (

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

Recall that two angles are complementary if the sum of their measures is? 90°. find the measures of two complementary angles if one angle is twenty dash nine times the other angle.