Std dev = sqrt of variance
hence variance would be 17^2= 289
Answer:
The radius of the cone is 9cm
Step-by-step explanation:
This problem bothers on the mensuration of solid shapes, a cone
The volume of a cone is expressed as
V=1/3(πr²h)
We were told that the radius r and the height h are equal
I.e r=h
Substituting h=r in the formula we have
V= 1/3(πr²*r)
V =1/3(πr³)
To find the radius r let us substitute our given 763.02cm³ (note we assume unit in cm)
763.02= 1/3(3.142r³)
763.02= (3.142r³)/3
763.02*3=3.142r³
2289.06=3.142r³
r³=2289.06/3.142
r³= 728.54
r= ³√728.54
r= 8.99cm
≈r= 9cm
hope this helps
Answer:
Price of Caleb's groceries before tax= $6.4
Step-by-step explanation:
Let price of groceries before tax be = $
Sales tax % = 2.5%
Sales tax applied =
Actual sales tax paid = $1.60
∴
Multiplying both sides by 100.
Dividing both sides by 25.
∴ Price of groceries before tax= $6.4
-0.1 - (x) = 0.3
-0.1 - (-0.4) = 0.3
-0.1 + 0.4 = 0.3
0.3 = 0.3 (true)
-0.4 is your answer
hope this helps
Answer:
72 mles
Step-by-step explanation:
For better understanding, I'll make use of an attachment.
From the attachment,
O represents the start point
--- Jack
-- Distance between them
Required
Find OA; Jack's distance
To do this, we make use of Pythagoras theorem
This gives:
Subtract 900 from both sides
Take square roots
<em>Hence, Jill drove 72 miles</em>