A study was done of children from a certain region with severe acute malnutrition. Of the 858 children randomized to receive an antibiotic treatment in addition to food, 775 recovered. Of the 858 children randomized to receive the placebo and food, 745 recovered. The trial was double-blind. Complete parts (a) through (c) below.
a. Find the percentage that survived in each group, and compare the percentages descriptively
The percentage that survived in the treatment group, %, is the percentage that survived in the placebo group. [%, so children who
the antibiotic treatment did better. The differe
eatment minus placebo) is 3%.
(Round to one decimal place as needed.)
equal to
greater than
less than

i think the answer is b.

step-by-step explanation:

not 100% sure though.

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.

$79500

step-by-step explanation: