Arock is dropped from a cliff and into the ocean. the height h (in feet) of the rock after t sec is given by h = −16t^2 + 144.a) what is the initial height of the rock? b) when is the rock 80 ft above the water? c) how long does it take the rock to hit the water?

C

BECAUSE IT WILL HIT HARDER

A) the rocks initial height is 144 ft.
b) after 2 seconds, the rock is 80 ft. above the water.
c) it takes 3 seconds for the rock to hit the water.

Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )