Answer:
The correct option is stratified sampling
Step-by-step explanation:
Stratified sampling is a sampling techniques that divide a population into strata which is homogeneous and then simple random sampling (SRS) is then applied in each stratum to get the required samples.
Looking at the question, the population has been divided into strata I.e those majoring in communication, those majoring in business, and those majoring in history, then simple random sampling is then applied to pick the required samples.
Answer:
Option C is the correct answer.
Step-by-step explanation:
The height, h(t), of the ball can be modeled as a function of time, t, by the equation h(t) = -16t² + 40t + 20
When the ball hits the ground, we have h(t) = 0
h(t) = -16t² + 40t + 20 = 0
![t=\frac{-40\pm \sqrt{40^2-4\times (-16)\times 20}}{2\times (-16)}=\frac{-40\pm \sqrt{2880}}{-32}\\\\t=\frac{-40\pm 53.67}{-32}\\\\\texttt{t = 2.93s or t = -0.43s}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B-40%5Cpm%20%5Csqrt%7B40%5E2-4%5Ctimes%20%28-16%29%5Ctimes%2020%7D%7D%7B2%5Ctimes%20%28-16%29%7D%3D%5Cfrac%7B-40%5Cpm%20%5Csqrt%7B2880%7D%7D%7B-32%7D%5C%5C%5C%5Ct%3D%5Cfrac%7B-40%5Cpm%2053.67%7D%7B-32%7D%5C%5C%5C%5C%5Ctexttt%7Bt%20%3D%202.93s%20or%20t%20%3D%20-0.43s%7D)
Negative time is not possible, so time = 2.93 seconds.
Option C is the correct answer.
Answer:
n= -5
Step-by-step explanation:
Answer:
105 minutes
Step-by-step explanation:
105 minutes or 1 hour and 45 minutes
Answer: Where is the question? We only see the dot plot.
Step-by-step explanation: May God bless you and have a nice day! :)