Its 35543562454645656466 and 3568899687698797997978 also 5679697-5679567-79567 two more 8439485949834595893458485 abd 84853945934853495834593458
<span>The point estimate obtained from a sample of which of the following sizes would most likely be closest to the actual parameter value is 150.
It is said that the higher the point estimate, the better. I think this deals with the confidence level of the sample derived from the population. The higher the confidence level, the closer the point estimate is to the actual parameter value.</span>
<span><span>Let x be the maximum speed of the plane and y be the speed of the wind
***Note: D = r*t or r = D/t***
x +y = 525mph |2100mi/4hr = 525mph
x -y = 350mph |2100mi/6hr = 350mph
2x = 875
x = 437.5mph, speed of plane. Wind speed is 87.5
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H=+15 m
v=+5 m/s
Ball hits the ground when h(t)=-15m
h(t)=-9.8t^2+vt+h
=>
-15=-9.8t^2+5t+15
9.8t^2-5t-30=0
Solve for t, using quadratic formula,
t=-1.513 or t=2.023
reject negative root due to context, so
t=2.023 seconds
2)
h(t)=-16t^2+20t+8
a. height before pitch is when t=0, or h(0)=8
b. highest point reached when h'(t)=-32t+20=0 => t=5/8 seconds
c. highest point is t(5/8)=-16(5/8)^2+20(5/8)+8=47/5=9.4 m
d. ball hits ground when h(t)=0 => solve t for h(t)=0
=> t=-0.3187 seconds or t=1.569 seconds.
Reject negative root to give
time to hit ground = 1.569 since ball was pitched.
Answer:
Step-by-step explanation:
