Penelope is adding fractions while taking a math test. What part of the brain is she using?

Cerebrum

Explanation:

The cerebrum is the part of human brain responsible for learning, memory , coordination and control of voluntary actions.

It is the largest part of the brain which controls and performs higher functions such as speech, reasoning, feelings, awareness e.t.c

This part of the brain is divided into the left and right hemisphere.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.