The coordinates of a triangle are p(1, 4), q(3, 6), and r(5, 2). the triangle is reflected over a line and its image coordinates are p'(–1, 4), q'(–3, 6), and r'(–5, 2).

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?