An object is propelled vertically upward with an initial velocity of 84 feet per second. The height h (in feet) of the object after a seconds is given by h(t)=-16t^2+ 76t. After how many seconds will the object strike the ground?

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Think you could get me the answers ?