Answer: c
Step-by-step explanation:
Multiply the diameter by pi. You got it right
If we plot the given values in the Cartesian plane, the points to which the line would pass are (0, 20) and (10, 100). Thus, the slope m is,
m = (y2 - y1) / (x2 - x1)
Substituting,
m = (100 - 20) / (10 - 0) = 8
Thus, I saved 8 pesos per week. The answer to the question is letter C.
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Therefore, the value of n is 30.
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Hence verified.
Writing this statement symbolically, we get:
n
--- - 5 = 8
2
Adding 5 to both sides, we get n/2 = 13. Then n = 26.
