You are given 'miles' and 'hours' and you want miles/hour ....does that help?
23.5 miles / (3/5 hour) ===== Answer mph
4 (x+15) =83
4x+60=83
4x=23
x=23/4
or 4x+ 15=83
4x=68
x=17
pi is not an area.
various viruses have different sizes....I'll need to know the individual or average size of the virus you are asking about....
1 33/76
ERROR though it gives the correct answer
ignore my -x^2+16 = 32 answer it is incorrect
use the -x^2+16 is a parabola answer max value = 64 at x = 8
you dropped a negative sign
Maybe easier:
-x^2 +16x is a parabola with a maximum value of 64 at x= 8
The answer will be in NEGATIVE DOLLARS.....did you copy that problem correctly?
3.5 x 3.5 = 12.25 so 3.5 > sqrt12
