A catapult is used to launch a boulder. The height of the boulder h can be modeled by the function (1) = -1682 + 641, where t is the time in seconds after the boulder is
launched. Assuming that the boulder doesn't hit anything, how many seconds after
launch will the boulder hit the ground?

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

What is the number 321,000,000 in scientific notation? also what is the number? ?

What describes horizontal cross section of the right rectangle 6m 8m 5m