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strojnjashka [21]

3 years ago

13

The proportion of students in a psychology experiment who could remember an eight-digit number correctly for t minutes was 0.9 −

0.4 ln(t) (for t > 1). Find the proportion that remembered the number for 7 minutes. (Round your answer to one decimal place.)

1 answer:

kaheart [24]3 years ago

8 0

Answer:

The proportion would be 0.1

Step-by-step explanation:

Given, the function that shows the proportion of students in a psychology experiment who could remember an eight-digit number correctly for t minutes,

$f(t) = 0.9 - 0.4\ln(t)$

If t = 7 minutes,

$f(7) = 0.9 - 0.4\ln(7)=0.9 - 0.77836=0.12164\approx 0.1$

Hence, the proportion that remembered the number for 7 minutes is 0.1 ( approx )

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alukav5142 [94]

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hope its right

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You should always switch the signs to their opposites if you're mutiplying a negative such as the - (-5) Hope I make sense

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