3. The figure below represents a triangular farm whose area is 6 hectares. Find
measure of lines BC in metres
A. 800 m
B. 400m
C. 8000m
D. 550m

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?