Along piece of wood of length 2.8 m is broken into 4 pieces with two pieces of length a and the other two pieces of length b. the four pieces are put together to form a rectangle. find b if your aim is to have a rectangle with the maximum area.

b = 0.7 m

Explanation:

Total length of the wooden rod is given as

so we will have

now we will have

so we have

now to find the maximum area

electric

explanation:

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption