Answer:

Step-by-step explanation:
We know that for principal amount P , time period T and rate of interest
, simple interest is given by
.
Here ,

To find : simple interest rate i.e., 
On putting values of
in formula , we get 

Now we need to round off the answer to the nearest tenth .
So, simple interest rate is % =
=
Answer:
-11/2
Step-by-step explanation:
Answer:
You can find the distance between each of the adjacent vertices and then add the results together.
Step-by-step explanation:
Perimeter is all of the side lengths added together, so if you can find the distances between each of the adjacent vertices and then add the together, it will be equivalent to adding all of the side lengths together.