Foundation June 2023 Paper 3 Q18
18 Rearrange this formula to make \(k\) the subject.
\(t = 2k - h\) [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(k = \dfrac{t + h}{2}\) oe final answer | 2 | B1 for answer \(\dfrac{t + h}{2}\) oe or M1 for \(t + h = 2k\) or \(\dfrac{t}{2} = k - \dfrac{h}{2}\) | For 2 oe allow \(k = \dfrac{t}{2} + \dfrac{h}{2}\) or \(k = 0.5t + 0.5h\) For B1 oe allow \(\dfrac{t}{2} + \dfrac{h}{2}\) or \(0.5t + 0.5h\) \(t - 2k + h = 0\) does not count as the first correct step |