Pls answer question 28 and 29 asap.

28.  86% decrease

Step-by-step explanation:

Original Sphere has a radius of 100%   →  r =1

Surface Area of Original Sphere:

S.A. = 4πr²

       = 4π(1)²

       = 4π

New Sphere has a diameter of 75%   →   d = 0.75    →    r = 0.375

Surface Area of New Sphere:

S.A. = 4πr²

       = 4π(0.375)²

       = 0.5625π

The negative sign represents a decrease.

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29.  72 bottles

Step-by-step explanation:

Volume of a hemisphere is:

Volume of a cylinder is:

The number of cylinders needed is:

answer: hey there,

the answer you are looking for is a..

hope this you!

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.