12(a)Standard Form Estimation BoundsEasy1 markWrite 230 000 in standard form.A23×104B2.3×105C2.3×104D2.3×106E2.3×10−5F2.3×103G2.3×107Grade answerGrading criteria
12(b)Standard Form Estimation BoundsMedium2 marksWork out (4.2×1032)−(4.2×1031).Give your answer in standard form.A3.78×1031B3.78×101C3.78×1033D3.78×1032E37.8×1031F4.2×1031G4.2×101Grade answerGrading criteria
12(c)Standard Form Estimation BoundsMedium2 marksWork out (80×1050)31.Give your answer in standard form.A2×1016B2×1018C20×1016D2×1017E4.3×1016F2×1051G2.7×1051Grade answerGrading criteria