Equilateral triangle abc has a perimeter of 96 millimeters. a perpendicular bisector is drawn from angle a to side at point m.

what is the length of ?

Apply heron's formula to get the area of the triangle.
since it is an equilateral triangle, we know that each side is 32mm.
we get the length of the line (h) from area = bh/a

27.7

Num of plants = (original#ofplants)*(1.6)^t

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.