22 random samples were selected from a population that has a normal distribution. The sample has a mean of 99 and a standard deviation of 5. Construct a 95% confidence level for the population standard deviation.

A. 4 < σ < 7

B. 2 < σ < 3

C. 76 < σ < 141

D. 1 < σ < 9

v = 1/3 a^2h

step-by-step explanation:

if the height is 57.7cm and the height of the slant edge is 18.2cm, then the volume is 1/3 a^2h.

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm