The empirical rule tells you 68% of the population is within 1 standard deviation of the mean. Your limits are 1 standard deviation from the mean, so your percentage is ...
... 68%
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98.20 - 0.62 = 97.58 . . . 1 standard deviation below the mean
98.20 + 0.62 = 98.82 . . . 1 standard deviation above the mean
First, separate the exponents of the first exponential:

Regroup e² on the numerator:

e² is now a constant that can be brought outside the limit:

This limit is a notable one, and we know it is equal to 1,
therefore:
e² · 1 = e²
Y - y₁ = m(x - x₁)
y - 32 = 1.5(x - 21)
y - 32 = 1.5(x) - 1.5(21)
y - 32 = 1.5x - 31.5
+ 32 + 32
y = 1.5x + 0.5
<span>3/18 written in its simplest form = 1/6 (divide top and bottom by 3)
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I believe this is a simple problem and the desks are 2 1/4 feet long.