An arrow is shot vertically upward from a platform 45 feet high at a rate of 168 ft/sec. Use the quadratic function h(t)=−16t2+168t+45 to find how long it will take for the arrow to reach its maximum height, and then find the maximum height. Give an exact answer.

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

Which expression is equivalent to sq-80

In order to be invited to tutoring or extension activities a students performance 20 point higher or lower than average for the