When I did 90-15log(7) I got an answer of 77.3 (3sf). Are you sure you put it in your calculator correctly?
Google's calculation
A, B, and D worked out, but when I try to do C I run into a problem.
I use the formula:
f(t)=90-15log(6+1)
For an answer I get:
90+log(1/474561509943)
Im pretty sure im doing something wrong because the other answers were more like 90 and 50
When I did 90-15log(7) I got an answer of 77.3 (3sf). Are you sure you put it in your calculator correctly?
Google's calculation