If a rock falls from a height of 35 meters on Earth, the height H (in meters) after x seconds is approximately H(x) =35 -4.9x. (a) What is the height of the rock when x = 1.6 seconds? The height of the rock when x = 1.6 seconds is meters. (Round to three decimal places as needed.) (b) When is the height of the rock 5 meters? The height of the rock is 5 meters when x seconds. (Round to two decimal places as needed.) (c) When does the rock strike the ground? The rock strikes the ground when x ~ seconds (Round to two decimal places as needed.)