Suppose chocolate costs $17.60 per kilogram. Karega buys 25 grams of chocolate and Samadhi buys 100 grams of chocolate.

How much more did Samadhi pay for her chocolate?

$0.44

$1.32

$2.20

$2.64

$1.32

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Step-by-step explanation:

0.0176 per gram for chocolate

25 x 0.0176= 0.44

100 x 0.0176= 1.76

1.76-0.44=1.32

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)