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zavuch27 [327]
3 years ago
8

What is the value of f(x)= 9^x when x=-2? A) 1/8 B) 81 C) 1/18 D) 18

Mathematics
1 answer:
lions [1.4K]3 years ago
4 0
Substitute -2 in for x and get (9)^-2
Flip the equation so that the exponent is positive and get 1/9^2
Work it out 1/(9*9) = 1/81

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The probability that a student, chosen at random, does not study chemistry is 20/41.

<h3>What is Probability?</h3>

Probability can be defined as the ratio of the number of favorable outcomes to the total number of outcomes of an event. For an experiment having 'n' number of outcomes, the number of favorable outcomes can be denoted by x. The formula to calculate the probability of an event is as follows.

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So, the probability = favorable outcome / total outcomes

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Thus, The probability that a student, chosen at random, does not study chemistry is 20/41.

Learn more about Probability from:

brainly.com/question/11234923

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