A spaceship traveled 81 billion miles. In scientific notation that is miles. 8.1 × 10 10 8.1 × 10 -9 8.1 × 10 9 8.1 × 10 -10

c. 16 units

step-by-step explanation:

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0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

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step-by-step explanation: