Here, we are required to determine how many hours will it be until the next instance when both foghorns sound at the same time.
The <em>lighthouse A and B </em>will have their foghorns sound at the same time after 30 hours.
- <em>Since lighthouse A sounds it's foghorn every 3hours, and lighthouse B sounds it's foghorn every 10 hours.</em>
To determine the next time when both foghorns sound at the same time;
We need to determine the lowest common multiple (LCM) of 3 and 10.
- The <em>lowest common multiple</em> of 3 and 10 is therefore 30.
As such, the foghorns sound at the same time after 30 hours of when the foghorns sounded the same time.
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Answer:
The probability that the middle school student owns a skateboard or a bicycle is 0.61.
Step-by-step explanation:
We are given that the probability of a middle school student owning a skateboard is 0.58, of owning a bicycle is 0.48, and owning both is 0.45.
A middle school student is chosen at random.
Let the probability of student owning a skateboard = P(S) = 0.58
The probability of student owning a bicycle = P(B) = 0.48
The probability of student owning both = P(S B) = 0.45
Now, the probability that the middle school student owns a skateboard or a bicycle is given by = P(S B)
P(S B) = P(S) + P(B) - P(S B)
= 0.58 + 0.48 - 0.45
= 0.61
Hence, the probability that the middle school student owns a skateboard or a bicycle is 0.61.
The answer is not any of the letters. I got x=15/2 or x=7.5. You may have made an error in your question.
The quotient is 4x-3. Hope this helps you:)