Stacy 150 collectible stamps in the garage sale each week. She purchases 30 stamps to attack collection. How many weeks will she need to purchase two stamps to get more than 800?

If you are just building your payment history, how many points from a perfect score will you possibly miss?

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?

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6