Answer: There is a 2.9% chance that a person has head lice given that the test is positive. (I know that sounds very low, but watch the math)
Imagine there are 10,000 students in the school. If 1% have lice, that makes 100 students that have it and 9,900 that don't.
Assume the test was given to all students. Out of the 100 that have lice, only 75 would get a positive test because it is only 75% accurate.
Now, out of the 9,900 student who don't have lice, 25% of them would get a positive test, because the test is only 75% accurate. That is 2,475 false positive tests!!!
So we had a total of 2,550 positive tests, but only 75 of those students actually have lice. 75 out of 2550 is 2.9%.
Answer:
4.2 liters per week
Step-by-step explanation:
600 times 7 equals 4,200.
Then you divide 4200 by 1000 to convert mililters to liters which is 4.2
I believe it is 1/6 but i'm not sure .
hope that helped
To make this easier, first draw or imagine a vertical line at x=2
Find where the vertical line and the graph intersects.
Draw or imagine that point of intersection.
Now, draw or imagine a horizontal line that goes through the point of intersection.
That horizontal line tells us the the value of the function by passing through that mark that says "-2"
The function's value at x=2 is -2.
Have an awesome day! :)
Try photo math it really helps