72% = 72/100
72/100=36/50=18/25
I believe the answer would be c!
Answer:
the answer is 5
Step-by-step explanation:
9514 1404 393
Answer:
time to max height: 2.5 seconds
max height: 104 ft
range of function: [4, 104]
Step-by-step explanation:
The equation for ballistic motion is ...
h(t) = -16t^2 +v0·t +h0 . . . . where v0 is the initial upward speed and h0 is the initial height
For the given parameters, the height function is ...
h(t) = -16t^2 +80t +4
The time for maximum height is ...
-b/(2a) = -80/(2(-16)) = 2.5 . . . seconds
The maximum height is ...
h(2.5) = (-16·2.5 +80)(2.5) +4 = 104 . . . feet
The range of the function is from the minimum height (at launch) to the maximum height:
4 ft ≤ h(t) ≤ 104 ft.
B(t) = 5000 * 2^(-0.05t)
<span>2000 = 5000 * 2^(-0.05t) , div by 5000 </span>
<span>0.4 = 2^(-0.05t) , ln on both sides => </span>
<span>ln0.4 = (-0.05t)* ln2 </span>
<span>(ln0.4)/ln2) /(-0.05) = t </span>
<span>t = 26.43 </span>
<span>After 27 years</span>