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Calculating in standard form

20 questions

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(a) Work out (3×10−4)2(3 \times 10^{-4})^2. Give your answer in standard form.

(b) Work out (2.5×103)2(2.5 \times 10^3)^2. Give your answer in standard form.
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Standard form in context

19 questions

LessonNot started
A grain of sand has a mass of 3.5×10−43.5 \times 10^{-4} grams. Work out the total mass of 2×1062 \times 10^6 grains of sand. Give your answer in kilograms, in standard form.
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A red blood cell has a diameter of 7×10−67 \times 10^{-6} m. A line of red blood cells, placed edge to edge, is 1.4 km long.

Work out the number of cells in the line. Give your answer in standard form.
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A country's national debt is £2.4×10122.4 \times 10^{12}.

The country's population is 6×1076 \times 10^7 people.

Work out the debt per person. Give your answer in standard form.
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A sheet of paper is 8×10−58 \times 10^{-5} m thick.

How many sheets make a pile exactly 22 m tall? Give your answer in standard form.
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