Answer:
A
Step-by-step explanation:
the answer is A
.......
U do the formula
slope = -9/4
SA=(a+b+c) h+bh
=(5+12+13)*4+5*12
=20*4+60
=80+60
=140 cm squared
10 x 25 = 250, well 20 x 25 is just double that, its 10 doubled x 25 so he probably just added it up. repeated addition really helps with times tables.
645/560=1.151785714
Ther perccent error in her estimate is 15%