Answer:
The hang time is 0.63 seconds
Step-by-step explanation:
We want to find out what the cricket's fall time is and we have the function that describes its height as a function of time.
The cricket is on the ground when its height is equal to zero. Therefore we must equal h to zero and solve the equation for t ..
We take t as a common factor
Then the height is zero when t = 0 and when (10-16t) = 0
At t = 0 seconds the cricket is still on the ground.
Then the cricket is in the air and after 0.63 seconds the cricket falls back to the ground
Answer:
Step-by-step explanation:
Confidence interval is one which has centre as mean. The width of the interval would be 2 times margin of error.
Margin of error = Critical value * Std error/sq rt of sample
Hence if margin of error is lower for same n, then it means lower confidence level. Option a is right
Similarly, if bigger the sample size, lower is margin of error . Hence option b is right
c) False. Smaller samples make margin of error big and hence confidence intervals bigger.
d) If n becomes 9n, then margin of error becomes 1/3 Hence option d is right.
Answer:
18pi
Step-by-step explanation:
Ⓗⓘ ⓣⓗⓔⓡⓔ
Well, if the diameter is 18, the radius is 9.
If he needs edging, he's building a fence-like-structure around the garden which will be the circumference.
The formula for circumference is 2*pi*r
We'd just plug in 9 for r.
2*pi*9=18pi
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310*0.3=93
93 students play an instrument.