What name is given to quadrilaterals in which the diagnosis are equal in length and bisect each other?

Did you mean the diagonal are equal in length and bisect each other?

In that case, it is parallelogram.

Hope this helps!

:)

Rectangles

Step-by-step explanation:

Diagonals bisect each other for all parallelograms.

But they are equal in a few.

Note: square is also a rectangle

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)