When Micaela runs the 400 meter dash, her finishing times are normally distributed with a mean of 81 seconds and a standard deviation of 1.5 seconds. What percentage of races will her finishing time be faster than 80 seconds, to the nearest tenth?

so far i think you have the right thing going for you just remember soh cah toh

step-by-step explanation:

sine over hypotenuse

cosine   equals adjacent

tangent over hypotenuse

definitely a. the others have almost all data points on one side of the line.

step-by-step explanation:

twenty-six miles over two gallons because the proportion for the original 13 miles to one gallon would be written 13/1 and, doing the same thing to the top and bottom, i multiplied by 2 and got 26/2