Answer:
t = 2.28 s
Step-by-step explanation:
h = 105 - 9t - 16t ^ 2
0 ft = 105 ft - 9t -16^t
To find the roots of a quadratic function we have to use the Bhaskara formula
, the roots will give us the time it takes to reach zero height
ax^2 + bx + c = 0
-16^t - 9t + 105 ft = 0 ft
a = -16 b = -9 c = 105
t1 = (-b + √ b^2 - 4ac)/2a
t2 =(-b - √ b^2 - 4ac)/2a
t1 = (9 + √(-9^2 - (4 * (-16) * 105)))/2 * (-16)
t1 = (9 + √(-81 + 6720))/ -32
t1 = (9 + √6639)/ -32
t1 = (9 + 81.84)/ -32
t1 = 90.84 / -32
t1 = -2.83 s
t2 = (9 - √(-9^2 - (4 * (-16) * 105)))/2 * (-16)
t2 = (9 - √(-81 + 6720))/ -32
t2 = (9 - √6639)/ -32
t2 = (9 - 81.84)/ -32
t2 = -72.84 / -32
t2 = 2.28 s
we have two possible values, we are only going to take the positive one, beacause we are talking about time
t2 = 2.28 s
Answer:
D hope this helps
Step-by-step explanation:
-y •2=-2
-2+2=0
4x+x=5x
6+3=9
5x=9
9 divided by 5
x=1.9
So there for I think the answer is 2 it’s closest to 1.9
We want to divide whole sand into scoops, so we have to divide 4/5 by 1/20. Lets do this
We know that if we want to divide 2 fraction we can multiply first by inverse of second fraction instead of dividing.,so:
scoops - its our result.
Answer:
It depends what the other angles are but you take the two add them together and then you subtract it from 360 (IF ITS A QUADRILATERAL) for all other shapes the angles add up to 180
Step-by-step explanation:
