Homework Help: Algebra 2 Honors

Posted by Christine on Sunday, June 6, 2010 at 9:59pm.

The amount of light emitted from a battery indicator bulb pulses while the battery is charging. This can be modeled by the equation y = 60+60sin[(pi/4)t] , where y is the lumens emitted from the bulb and t is the number of seconds since the beginning of a pulse. At what time will the amount of light emitted be equal to 110 lumens?

Algebra 2 Honors - Reiny, Sunday, June 6, 2010 at 10:05pm
mhh, aren't we just solving
60 + 60sin[(π/4)t] = 110 ?

sin[(π/4)t] = .833333
make sure your calculator is set to radians
[(π/4)t] = .98511
t = .....

let me know what you got
Algebra 2 Honors - Christine, Sunday, June 6, 2010 at 10:15pm
im stupid
Algebra 2 Honors - Christine, Sunday, June 6, 2010 at 10:24pm
1.25 is what i got
Algebra 2 Honors - Reiny, Sunday, June 6, 2010 at 10:51pm
correct!
good job
Algebra 2 Honors - Christine, Sunday, June 6, 2010 at 10:57pm
THANK YOU!

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