Find the average number particles hitting the surface perunit area and per unit time

What is the equation of the line in point-slope form? y+ 4 = 1/2(x+4) y-4 = 1/2(x + 4) y-0 = 2(x - 4) y-4 = 2(8-0)

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?