Given that z20 = –2 and z50= – 1, which of the following do you know? 1.) the variance is 10. 2.) the standard deviation is 30. 3.) the mean is 80. 4.) the median is 40. 5.) the data point x=20 is 2 standard deviations form the mean 6.) the data point x=50 is 1 standard deviation from the mean 7.) the data point x=45 has a z-valued of 1.5

it is 2;3;5;6

Step-by-step explanation:

Given that z20 = –2 and z 50= –1, which of the following do you know?

The variance is 10.

The standard deviation is 30.

The mean is 80.

The median is 40.

The data point x = 20 is 2 standard deviations from the mean.

The data point x = 50 is 1 standard deviation from the mean.

The data point x = 45 has a z-value of 1.5.

answer2356 on edge

answer: ratio of volume of cone (with 3 times the height and equal diameter) to volume of cylinder is 2 to 1. the value of π is not used.

step-by-step explanation:

radius is diameter/2 = 4.

area of circle is π r^2.

volume of cylinder is height × area of base = hπr^2 = 3(4^2) π = 48π cubic inches.

not knowing the formula for volume of cone, i calculate it using calculus (which is for calculating things).

volume of cone is integral 0 to h area(y) dy. area(y) is π r(y)^2. r(y) runs r to zero as y runs zero to h, r(0) = r, r(h) = 0.

r(y) = r - r/h y

area(y) = π (r - r/h y)^2 = π (r^2 - 2r^2y/h + r^2y^2/h^2) = π r^2(1-2y/h+y^2/h^2)

antiderivative area(y) = π r^2 (y-y^2/h+y^3/(3h^2))

integral 0 to h = π r^2(h-h^2/h+h^3/(3h^2) - (0)) = π r^2(h - h + h/3) = π r^2(h/3) = π/3 r^2 h

volume of this cone is π/3(4^2)18 cubic inches.

= 6 16 π = 96π cubic inches.

cone has twice the volume, 96/48.

cone height is 6 times the cylinder.

ratio of volume formula: π r^2 cancels.

cone over cylinder ratio is 6h/3 to h, 2 to 1.

answer: the answer is ann