A=g
v=⌠g dt
v=gt+C, where C=v initial
v=gt+vi
h=⌠v dt
h=gt^2/2+vit+C, where C=h initial
h=gt^2/2+vit+hi
We are told that vi=42 ft/s, hi=0, and we know g≈-32 ft/s^2 so
h(t)=-16t^2+42t
The ball will hit the ground when h=0 so
-16t^2+42t=0
-2t(8t-21)=0, since t>0
8t-21=0
8t=21
t=21/8
t=2.625 sec
t≈2.6 sec (to nearest tenth of a second)
Answer: 99% Confidence interval = 6.97, 8.706
Step-by-step explanation: Please find the attached document for the step by step explanation
180*60%=180*60/100=10800/100=108
180+108=288
So the total population os school is 288 students!
If you have any questions ask down below!
Answer:
10 girls are not on either team
Step-by-step explanation:
first subtract 6 from 8 to get 2 (since it's easier) because those 6 girls are on the math league team as well
next add 2 and 13 to get 15
last subtract 15 from 25 to get 10
B is correct because -6.75 is smaller than -6.5
