Answer:
4.6.
Step-by-step explanation:
The rocket hits the ground when h(t) = 0. So

Solving a quadratic equation:
Given a second order polynomial expressed by the following equation:
.
This polynomial has roots
such that
, given by the following formulas:



In this question:

So

Then



Time is a positive measure, so the answer is 4.6.
0.3 is x but I can’t see the full problem so I’m nit sure what they are asking
Multiply 2 1/4, 1 3/5 and 2 1/3 together! It would be easier to turn these mixed fractions into improper fractions.