The possible outcomes for tossing a coin four times are shown below. 1. T-T-T-T 5. T-H-T-T 9.H-T-T-T 13. H-H-T-T
2. T-T-T-H 6. T-H-T-H 10.H-T-T-H 14. H-H-T-H
3. T-T-H-T 7. T-H-H-T 11.H-T-H-T 15. H-H-H-T
4. T-T-H-H 8. T-H-H-H 12.H-T-H-H 16. H-H-H-H
Tails = T Heads = H

If a coin is tossed four times, what is the probability of getting exactly four heads?

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The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.