the blood alcohol concentration(BAC)in the uk is 0.08%. A well known formula for calculating BAC percentage is widmarks formula

BAC%=5.14A/rW -0.015H
Where A is the total alcohol consumed in ounces, W is the body weight in pounds, r isthe alcohol distribution ration (0.73 for men, 0.66 for women) and H is the time passed in hours since drinking commenced.
A female driver started drinking 90 minutes ago, she has consumed 2 small glasses of wine (125ml each at 12% abv) she weighs 9 stone, according to widmarks formula is she over the limit?

To determine if the female driver is over the legal limit of 0.08% BAC in the UK according to the Widmark's formula, we will follow these steps:

Step 1: Convert measurements to the appropriate units.
- The weight of 9 stone needs to be converted to pounds. 1 stone is equal to 14 pounds, so 9 stone = 9 x 14 = 126 pounds.
- Convert the alcohol consumed from milliliters to ounces. 1 ounce is approximately equal to 29.58 milliliters. So, 2 small glasses of wine (125 ml each) equal 2 x 125 / 29.58 = 8.44 ounces.

Step 2: Calculate the BAC using Widmark's formula.
- For women, the alcohol distribution ratio (r) is 0.66.

BAC% = (5.14 * A) / (r * W) - (0.015 * H)

Substituting the values:
BAC% = (5.14 * 8.44) / (0.66 * 126) - (0.015 * 1.5)
BAC% = 43.8192 / 83.16 - 0.0225
BAC% = 0.52713 - 0.0225
BAC% = 0.50463

According to the Widmark's formula, the estimated BAC percentage for the female driver is 0.50463%.

Step 3: Compare the BAC to the legal limit.
The legal limit in the UK is 0.08%.

Since the estimated BAC of the female driver is less than the legal limit of 0.08%, she is not over the limit.