I need help with part B plsss !!

The time taken for the object to travel the given height is determined as 12.48 seconds.
Time of motion of an object is the total time taken by the object to travel a given height or distance.
The time of motion of the boulder is calculated as follows;
h = vt + ¹/₂gt²
where;
1300 = 43t + 0.5(9.8)t²
1300 = 43t + 4.9t²
4.9t² + 43t - 1300 = 0
solve the quadratic equation using formula method as shown below;
a = 4.9, b = 43, c = -1300
t = 12.48 seconds
Thus, the time taken for the object to travel the given height is determined as 12.48 seconds.
Learn more about time of motion here: https://brainly.com/question/2364404
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