If a certain cannon is fired from a height of 8.2 meters above the ground, at a certain angle, the height of the cannonball above
the ground, h, in meters, at time, t, in seconds, is found by the function h(t) = -4.914 + 30.5t + 8.2. find the time it takes for the
cannonball to strike the ground.

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota