Answer:
A. 1200
Step-by-step explanation:
Since 10 times 3 is 30, then 400 times 3 is 1200. Hope I helped!
Answer:

and

Step-by-step explanation:
First make all the fractions into improper fractions

After doing that put them back into the problems
Problem 1)
÷
, plug in the improper fractions
÷
to divide, you need to flip the second fraction and multiply
·
=
then reduce

Problem 2)
÷
Plug in improper fraction
÷
Then flip second fraction and multiply
·
Multiply
Reduce, or make it a mixed number

Because it's a straight line
Answer:
The answer would 1680 m
Step-by-step explanation:
You solve this equation by multiplying base x height and the multiplying that by width, since this shape is a triangle you would divided it by 2.
I believe it's the 3rd one