PLEASE HELP FAST!! 1) Construct the perpendicular bisector of the given line segment.
2) Construct the perpendicular bisector of the side
opposing A.

1) The perpendicular bisector of the given line segment is 90 degrees

Step-by-step explanation:

I don't know the second one

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!