Doctors treated a patient at an emergency room from 2:00 P. M. to 7:00 P. M. The patient's blood oxygen level L (in percent) during this time period can be modeled by L = −0.270t2 + 3.55t + 82.1, 2 ≤ t ≤ 7
where t represents the time of day, with
t = 2
corresponding to 2:00 P. M. Use the model to estimate the time (rounded to the nearest hour) when the patient's blood oxygen level was 93%.
P. M.

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.

isocolese triangle

we know that the line connect a and b is the hyptonuse

so first find the hypotonuse length using the distance formula, call the length c

since it is an isocolese triangle, the lengths of the legs are the same

using pythagorean theorem,

in this case, a=b since isocolese triangle so we get

or

we can find c so we can find the distances

we know that if we draw 2 circles, each has center at a and b, and find where they intersect, we can the 2 possible locations for c

if a has center at (xa,ya) and b has center at (xb,yb), then we can solve where

and

intersect to find where they intersect

i'm not going to put an example because i have to go to class. i hope this explanation is enough

the five is the numerator