I think the answer would be B
Answer:
(a) 10 seconds
(b) 490 meters
Step-by-step explanation:
<h2>
<u>(</u><u>A</u><u>)</u></h2>
When the object hits the ground, it shows that the height is 0. Hence, h(t) = 0.
0 = 4.9(10+t)(10-t)
0 = (10+t)(10-t)
t = 10, -10
Since time cannot be negative, t = -10 will be rejected.
Therefore, t = 10 seconds
<h2>
<u>(</u><u>B)</u></h2>
Based on the question, <em>"</em><em>t </em><em>seconds </em><em>after </em><em>the </em><em>object </em><em>is </em><em>dropped </em><em>from </em><em>a </em><em>helicopter"</em><em>,</em><em> </em>means that the time starts right after the object is dropped from the helicopter, this shows that t = 0.
h(0) = 4.9(10+0)(10-0)
= 4.9(100)
= 490 meters
Add any negative number that will make it less than three!
Answer:
13
Step-by-step explanation:
Since -5 is less than zero, we use the second equation, and substitute the -5 in for the x.
-2(-5)+3=13