The circumference of a circle c is directly proportional to its radius r. if the circumference of a circle whose radius is 5 inches is 10pi inches. what is the circuference of a circle whose radius ia 8 inches

16 pi inches

Circumference is double the radius

stethere all not eveanp-by-step explanation:

"standard form:

3x2 + 14x − 10 = 0

solutions based on quadratic formula:

x1   = −14 − √ 142 − 4×3×(−10) /   2×3   = −14 − 2 × √ 79 /   6   ≈ −5.296

x2   = −14 + √ 142 − 4×3×(−10) /   2×3   = −14 + 2 × √ 79 /   6   ≈ 0.629