Saturday

April 18, 2015

April 18, 2015

Posted by **Please, Please Help!** on Thursday, February 2, 2012 at 10:52pm.

S(t) = 68 − 20 log (t + 1), t ¡Ý 0.

What was the average score when they initially took the test, t = 0?

Round your answer to a whole percent, if necessary.a)Answer:

Show your work in this space:

What was the average score after 4 months? after 24 months?

Round your answers to two decimal places.b)Answer:Show your work in this space:

After what time t was the average score 50%?Round your answe

- college algebra -
**Reiny**, Friday, February 3, 2012 at 8:19amwhen t = 0

S(0) = 68 - 20log(1) = 68

when t= 4

S(4) = 68 - 20log(5) = 54.02... or 54

etc.

for score to be 50

50 = 68 - 20log(t+1)

log(t+1) = 18/20 = .9

t+1 = 10^.9

t = 10^.9 - 1 months

= 6.943 or appr. 7 months

**Answer this Question**

**Related Questions**

college algebra - Students in an English class took a final exam. They took ...

College Algebra - Students in an English class took a final exam. They took ...

Algebra - Students in an English class took a final exam. They took equivalent ...

algebra - students in a biology class just took a final exam. a formula for ...

Statistics - In Professor Smith's statistics course, the correlation between ...

VNS,Math - Mr. Bobby bought 50 shares at $60, and 2 months later purchased 25 ...

math - The mean score on a Math exam was 50% and the standard deviation was 10...

Math - Professor Smith gives only a midterm exam and a final exam. The average ...

statistics - Suppose that the mean score of an exam was 77 when taken 30 ...

statistics - Suppose that the mean score of an exam was 77 when taken 30 ...