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The image below shows the graph of a sound recorded on an oscilloscope. What are the period and the amplitude? (Each unit on the t-axis equals 0.01 seconds.) A. 0.025 seconds; 4.5 B. 0.05 seconds; 9 C. 0.025 seconds; 9 D. 0.05 seconds; 4.5
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period is the time taken for 1 cycle
well the highest and lowest number it reaches is 4.5. so we can eliminate B and C
a cycle for a cos graph is when it goes up and down once
okay
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