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Bansri R.
Student in College
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SAT
TutorMe
Question:

15% of 500 is 30% of what number?

Bansri R.
Answer:

Answer: 250. .15 * 500 = .30 * x (.15*500)/.30 = x

Linear Algebra
TutorMe
Question:

True/False: If A and B are both invertible, then A+B is also invertible.

Bansri R.
Answer:

False. if A and B are both invertible, it is not necessary that A+B is also invertible, because the determinant of A+B may equal zero. As a rule of the inverse of matrices, for an inverse of a matrix to exist, the matrix must not have a zero determinant.

Biology
TutorMe
Question:

Discuss the function of the pituitary gland in the regulation of the menstrual cycle.

Bansri R.
Answer:

The pituitary gland aids in the secretion of FSH (follicle stimulating hormone), which stimulates the follicle cells to mature and develop, and secrete estrogen. The secretion of estrogen allows more FSH receptors to be formed in order to respond more strongly to the FSH, which increases estrogen levels and stimulates the thickening of the endometrium(lining of the uterus). The increase in estrogen levels causes LH(luteneizing hormone) to be secreted, which stimulates ovulation, more progesterone, and decreases the secretion of estrogen.

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