The diameter of a ball was measured with a degree of accuracy to the nearest 1cm; the diameter equaled 20 cm. What is the smallest possible volume of the ball (V=4/3πr^3) to the nearest cm^3? A. 2255cm^3

B.3882cm^3

C. 7765cm^3

D. 15530cm^3

answer for #1 is c

answer for #2 is d

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step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

the answer is 8.64

step-by-step explanation:

first, let's see what the pattern is.

58 - x = 47

46 - x = 36

x = 9

so this means that the term after 25 is 25 - 9:

the next term in the sequence is 16.