The answer depends on how long her yoga class is. If she is taking four breaths every ten seconds she'd take 24 breaths a minute or 1440 breaths an hour.
The answer is = because of you take away the 0 in the decimal 8.250 it's the same decimal as 8.25 and in decimals the zeros farthest to the right don't matter. 8.25 = 8.250
