Find the sum of the series.
A. 15
B. 20
C. 105
D. 130
Answer: B
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In a certain lake the intensity of light from the surface decreases by 40% for each additional meter of depth.
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A: Explain why light intensity is an exponential function of depth.
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B: Using 
for intensity at the surface of the lake, write a formula that gives the intensity I of light ?d meters below the surface.
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C: At what depth will light intensity be one tenth of surface intensity? Round your answer to two decimal places if necessary.
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What will be an ideal response?
Provide an appropriate response.Write in scientific notation: 3,820,000
What will be an ideal response?
Perform the operations.
A. 0.00496 B. 0.496 C. 49.6 D. 0.0496
Classify the system as either consistent or inconsistent.
A. Consistent B. Inconsistent