A rock is thrown upward with a velocity of 22 meters per second from the top of a
45 meter high cliff, and it misses the cliff on the way back down. When will the rock be
9 meters from ground level? Round your answer to two decimal places.

Miguel is setting up his new classroom with total floor space of 1,600 ft. the classroom must contain two square tables that are 4 ft by 4 ft, a 2 ft walkway between desks not against the wall or each other, a 2 ft space between the chalkboard and the first row of desks, and miguel's desk, which is 10 ft by 4 ft and is always on the opposite side of the classroom from the chalkboard. click here to see the current configuration of the classroom with desk space for 28 students. miguel needs to redesign the classroom to accommodate 8 more students, and he wants to let the students work in groups. should he place the desks in equal groups of 2, 3, or 4 desks pushed together? explain he should move the desks to groups of because