Answer:
D. t = 5
when the object is at rest => x(t) = 0
<=> -t^2 + 4t + 5 = 0
<=> t^2 - 4t - 5 = 0
<=> (t - 5)(t + 1) = 0
=> t = 5 or t = -1
but t》0
=> t = 5
Two equal triangles
2(1/2×b×h)
=2(1/2×8×10)
Three rectangles
=3(l×h)
=3(18×8)
=3(144)
Total Surface area
Step-by-step explanation:
Height of the triangle = 3 units
Height is always the perpendicular length.
yes
solve for x by simplifying both sides of the equation, then isolating the variable.
x = 8