A rock falls from a tower that is 320 feet high. As it is falling, its height is given by the formula h equals 320 minus 16 t squared . How many seconds (in tenths) will it take for the rock to hit the ground (hequals0)?

a. 4.5secs

Explanation:

From the question, the equation describing the height is given by

at the point when the rock hit the ground, the height,h will be zero.

Hence we can have

hence the rock will hit the ground in 4.5secs

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

answer and explanation;