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Elis [28]
3 years ago
12

What is Best Buy out of 3 lbs for 1.89 or 5lbs for 2.49

Mathematics
2 answers:
vodomira [7]3 years ago
8 0
1.89 / 3 = 0.63 per pound
2.49/ 5 = 0.498 per pound

answer 
<span>5lbs for 2.49 is the best buy</span>
Semenov [28]3 years ago
3 0
Divide the price by pounds to get the price for one pound: 

1.89 / 3 = 0.63
2.49 / 5 ≈ 50

5 pounds for $2.49 is the better deal.
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\bold{(x+2))^2+(y-2)^2+(z-2)^2=17}

Step-by-step explanation:

Given the center of sphere is: (-2, 2, 3)

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Solution:

First of all, let us have a look at the equation of a sphere:

(x-a)^2+(y-b)^2+(z-c)^2=r^2

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Radius of the sphere is nothing but the distance between any point on the sphere and the center.

We are given both the points, so we can use distance formula to find the radius of the given sphere:

D = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2+(z_2-z_1)^2}

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r = \sqrt{(-2-0)^2+(2-0)^2+(3-0)^2}\\\Rightarrow r = \sqrt{4+4+9} = \sqrt{17}

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(x-(-2))^2+(y-2)^2+(z-2)^2=(\sqrt{17})^2\\\bold{(x+2))^2+(y-2)^2+(z-2)^2=17}

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