An equilateral triangle has a side length of 16 cm work out the area of the triangle. Give your answer rounded to 1 DP.

110.9 cm²

Step-by-step explanation:

The area (A) of an equilateral triangle is calculated as

A =  ( s is the side length )

Here s = 16, thus

A =

   = = 64 ≈ 110.9 cm² ( to 1 dec. place )

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

where are the choices?