An estimate helps you place the decimal point because when you place 3.7 and 5.1 to multiply you have to count how many spaces of numbers there are. So the answer is 18.87.
800 is 10 times as much as 80
-26 because negative subtract
Answer:
0.0908
(to 3 S.F.)
Step-by-step explanation:
Area = π
π *
= 907.92
= 908 
=0.0908 
I would say its the second one.
the student shouldve distributed the 2^3x+3 into 2^3x+9