What is \(6\ 280\ 000\) in standard form?
- \(628\times 10^4\)
- \(62.8\times 10^5\)
- \(6.28\times 10^6\)
- \(0.628\times 10^7\)
v1 Measurement, STD2 M1 2020 HSC 2 MC
What is 0.0004782 expressed in standard form with two significant figures?
- `4.8 xx 10^(-4)`
- `4.78 xx 10^(-4)`
- `4.8 xx 10^(-5)`
- `4.78 xx 10^(-5)`
v1 Measurement, STD2 M1 2015 HSC 1 MC
The distance from Earth to the Moon is approximately 384 400 km.
What is this distance in standard form correct to two significant figures?
- `3.84 × 10^5\ \text{km}`
- `3.8 × 10^5\ \text{km}`
- `3.9 × 10^5\ \text{km}`
- `3.84 × 10^6\ \text{km}`
Measurement, STD1 M1 2022 HSC 1 MC
What is 650 000 000 expressed in standard form?
- `6.5 xx10^(7)`
- `6.5 xx10^(8)`
- `65 xx10^(6)`
- `65 xx10^(7)`
Measurement, STD1 M1 2020 HSC 3 MC
What is 0.002073 expressed in standard form with two significant figures?
- `2.07 xx 10^(-2)`
- `2.1 xx 10^(-2)`
- `2.07 xx 10^(-3)`
- `2.1 xx 10^(-3)`
Measurement, STD2 M1 2020 HSC 2 MC
What is 0.002073 expressed in standard form with two significant figures?
- `2.07 xx 10^(-2)`
- `2.1 xx 10^(-2)`
- `2.07 xx 10^(-3)`
- `2.1 xx 10^(-3)`
Measurement, STD2 M1 2015 HSC 1 MC
What is 1 560 200 km written in standard form correct to two significant figures?
- `1.56 × 10^4 \ text(km)`
- `1.6 × 10^5 \ text(km)`
- `1.56 × 10^6 \ text(km)`
- `1.6 × 10^6 \ text(km)`
Measurement, STD2 M1 2007 HSC 1 MC
What is `0.000\ 000\ 326` mm expressed in scientific notation?
- `0.326 xx 10^-6\ \ text(mm)`
- `3.26 xx 10^-7\ \ text(mm)`
- `0.326 xx 10^6\ \ text(mm)`
- `3.26 xx 10^7\ \ text(mm)`
Measurement, STD2 M1 2009 HSC 25b
The mass of a sample of microbes is 50 mg. There are approximately `2.5 × 10^6` microbes in the sample.
In standard form, what is the approximate mass in grams of one microbe? (2 marks)
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