Question 26
VariationIf x varies directly as √n and x = 9 when n = 9, find x when n = 17/9
- A.4
- B.27
- C.√3
- D.√17
Show the answer and explanation
Answer: D (√17)
Explanation
x = k√n with 9 = 3k, so k = 3. When n = 17/9, x = 3 × √17/3 = √17.
If x varies directly as √n and x = 9 when n = 9, find x when n = 17/9
Answer: D (√17)
x = k√n with 9 = 3k, so k = 3. When n = 17/9, x = 3 × √17/3 = √17.