Note, if you have a linear scale, then the surface will be the square othis scale & the volume will be the cube of the linear.
Our linear scale is 3/7. then the ration of their corresponding bvolume is:
3³/7³ = 27/343
Answer:
(b) 1:9
(c) 1:8
Step-by-step explanation:
(b) x*y : kx*ky, so 1:k² with k=3 is 1:9
(c) Assuming the rectangles get a z dimension, the volumes would have a ratio of xyz : xkykzk = xyz : xyzk³ = 1 : k³. With k=2 that is 1:8. But the z was never introduced so this is a bit inconclusive.
The answer is 5. this can be found by creating a factor tree of both numbers
Given:
n = 40, sample size
xb = $6.88, sample mean
σ = $1.92, population standard deviation
At 90% confidence interval, the expected range is

= [ 6.88 - 1.645*(1.92/√40), 6.88 + 1.645*(1.92/√40)]
= (6.38, 7.38)
Answer:
The 90% confidence interval is ($6.38, $7.38)