Answer:
the projectile reached a maximum height of 27.6 meters in 2.4 seconds and it took 5.0 seconds for it to hit the ground
Step-by-step explanation:
to find the vertex you can find the axis of symmetry first
that equation is -b/2a
-19/-8 = 2.375
then you take this and plug it in
-4(2.375)^2 + 19*2.375 + 5
that gives you 27.5625
then you have to find when it hits the ground
you can factor to find this out
-4t^2 + 19t + 5
4t^2 - 19t - 5
4t^2 + t - 20t - 5
t(4t + 1) -5(4t +1)
(t - 5)(4t + 1)
t = {5, -1/4}
we can only take positive time so it took 5 seconds
the answer is the second one
458
the answer is the last one
Answer:
D
Step-by-step explanation:
<em>Answer</em><em>:</em>
<em>$</em><em>2</em><em>0</em><em>.</em><em>5</em><em>5</em>
<em>Explanation</em><em>:</em>
- 1apple pie needs 2/3/4pounds of apple
- 1pound cost $2.49
- 2/3/4 = ?
- 2/3/4 ×2.49
- =$6.85 for one pie
- For 3 pies ,
- =$6.85×3
- = $20.55
Answer:
3
Step-by-step explanation:
bk idk just guess
