Higher November 2018 Paper 2 Q7
7
(a) Write the number 0.000 086 23 in standard form. (1)
(b) Work out \(\dfrac{3.2 \times 10^3 + 5.1 \times 10^{-2}}{4.3 \times 10^{-4}}\)
Give your answer in standard form, correct to 3 significant figures. (2)
Give your answer in standard form, correct to 3 significant figures. (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(8.623 \times 10^{-5}\) | B1 | cao |
| Answer | Mark | Mark scheme |
|---|---|---|
| \(7.44 \times 10^6\) | M1 | for \(\dfrac{3200 + 0.051}{0.00043}\) or \(\dfrac{3200.051}{0.00043}\) or performs an operation eg shows 163.2, 7441860.5, 118.6(…) or an answer or \(7.44(\ldots.) \times 10^n\) where \(n \neq 6\) or 7441979(….) or an answer of \(7.4 \times 10^6\) |
| A1 | for \(7.44(1979\ldots) \times 10^6\) |
Additional guidance
7441979.0689…
If a correct answer is shown in working and then rounded incorrectly, award full marks.
Answer need only be given correctly to 3 sig fig; if following digits are incorrect ignore them.