Architecture the scale model of a building is 5.4 feet tall. a. if the original building is 810 meters tall what was the scale used to make the model? b. if the model is made out of tiny bricks each measuring 0.4 inch in height, how many bricks tall is the model?

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116