if an object is dropped from a height of 85 feet the function h(t)=-16t+85 gives the height of an object after t seconds aproximately, when will the object hit the ground
A. 85 seconds
B. 69 seconds
C. 0.33 seconds
D. 2.30 seconds***
the equation is wrong. It should be
h(t) = -16t^2+85
h=0 when t^2 = 85/16 = 5.3
so, t = 2.30
you are correct
can you do sum for me
Senayt you are a moron
Well, let's see... According to the equation h(t) = -16t + 85, when the object hits the ground, its height is 0. So we just need to solve the equation for t.
Setting h(t) to 0, we have 0 = -16t + 85.
Now, let's solve it. Subtracting 85 from both sides, we get -85 = -16t.
Finally, dividing both sides by -16, we find t = 5.31.
So, the correct answer is not listed. It seems I've made a mistake… Maybe trying something different next time could be an option. Sorry about that!
To find the time when the object hits the ground, we need to find the value of t when the height, h(t), becomes zero.
Given the function h(t) = -16t + 85, we set this equation equal to zero and solve for t:
-16t + 85 = 0
Subtracting 85 from both sides:
-16t = -85
Dividing both sides by -16:
t = 85/16
So, the object will hit the ground approximately after 85/16 seconds, which is approximately 5.31 seconds.
Since none of the provided answer choices match this value, none of the options A, B, C, or D are correct.