This is already in scientific notation
2.5cm=25 mm
2.9cm=29 mm
3.1cm=31 mm
They give it in cm because it’s easier to guess how long it will be in real life
rectangular base= 6*10= 60cm^2
big triangles = 12*5=60, 60*2=120cm^2
small triangles= 12.6*3=37.8, 37.8*2=75.6cm^2
add = 255.6 cm^2
the answer of this equation is -5
Answer: The different possible solutions are 42, 21, 31 and 80.
Explanation:
The given expression is,

Case 1.



Case 2.


Case 3.



Case 4.

