The track team ran a 100-meter sprint. Their times are shown in the table. 9.8 10.4 12.1 9.4 10.1 10.0 11.1
10.9 10.9 9.3 12.09.6 9.9 12.5
Rounded to the nearest tenth of a second, what is the mean 100-meter sprint time of the team?
A 10.1 seconds
B. 10.3 seconds
c. 10.6 seconds
D 10.9 seconds

What is the aswer?

Step-by-step explanation:

-3

step-by-step explanation:

a drawing really does here:

so i draw the horizontal line y=2 and the vertical line x=-2 at this intersection i put b (this is where my right angle is going to be).   so point b is at (-2,2).   point a is 5 units long and is also on y=2 so this point has to be (3,2) or (-7,2) -doesn't matter i will go with (3,2).

now we know c is at (-2,y) we don't know the y yet bet we know that c is on x=-2.

we have the area of the triangle is .5bh=12.5

we know the base length is 5 (ab)

we have the height is (2-y) if you look at your

plug in

.5(5)(2-y)=12.5

solve for y to get the y-coordinate for c

2.5(2-y)=12.5

divide both sides by 2.5 giving:

2-y=5

now subtract 2 on both sides

-y=3

y=-3