Answer: 90% confidence interval would be (6.022,6.986).
Step-by-step explanation:
Since we have given that
Number of students = 361
Sample mean = 6.504
Sample standard deviation = 5.584
Standard error of the mean = 0.294
At 90% confidence level,
So, α = 0.01
So, z = 1.64
Margin of error is given by

So, Lower limit would be

Upper limit would be

So, 90% confidence interval would be (6.022,6.986).
Answer:
7.28
Step-by-step explanation:
1.82*4= 4+3.20+.08= 7.28
Answer:
Subtract 3 from it to get 43
Step-by-step explanation:
Let
F1------------------------- > airplane speed <span>150 mi / h East
F2-------------------------- > </span>wind speed <span>30 mi / h North
calculate the resultant force R
F1x=150 F1y=0 F2x= 0 F2y=30
Rx=F1x+F2x------------- >150+0 ---------------- >Rx=150
</span>Ry=F1y+F2y------------- >0+30 ---------------- >Rx=30
║R║=√150² 30²=√23400=152.97----- >153 mi/h
tan(theta)=Ry/Rx=30/150=0.20
arctan (0.20)=11.31 degrees-----------11.3 degrees
the answer is
actual speed 153 mi/h and direction 11.3 degrees North-East (I Quadrant)
Answer:
Volume: V≈113.1
Step-by-step explanation:
Solved for sphere
Shape: Sphere
Formula: V=43πr3
Volume: V≈113.1
1: R is the radius meaning calculate the radius to find the volume of a sphere.
2: The correct answer is below for this question.
Answer: V≈113.1
<em><u>Hope this helps.</u></em>