#### Answer

$W = 5 + 0.64 * 50 = 37$

#### Work Step by Step

To use this model to predict the percentage of women lawyers in 2020, we need to:
1. Determine $x$, which is the number of years passed since 1970, which in 2020 is equal to:
$2020-1970=50$ (years)
2. Substitute 50 for $x$, and use the formula to get the answer.
$W = 5 + 0.64 * 50 = 5 + 32 = 37$