You Think You Are Clever? Prove IT!

Explanation
The pituitary, adrenal, and thyroid glands are all part of the endocrine system. The endocrine system is responsible for producing and secreting hormones that regulate various bodily functions. The pituitary gland produces hormones that control other glands in the body, including the adrenal and thyroid glands. The adrenal glands produce hormones such as adrenaline and cortisol, which help regulate stress responses and metabolism. The thyroid gland produces hormones that control metabolism and growth. Therefore, the correct answer is endocrine.

Explanation
The area of a triangle is calculated using the formula: Area = (base * height) / 2. In this case, we know that the area is 48 square inches and the base is 6 inches. Plugging these values into the formula, we can solve for the height: 48 = (6 * height) / 2. Simplifying the equation, we get: 96 = 6 * height. Dividing both sides by 6, we find that the height is 16 inches.

Explanation
By heating limestone and clay and grinding them into a fine powder, the process described is the production of hydraulic cement. Hydraulic cement is a type of cement that hardens when it comes into contact with water. It is commonly used in construction for its ability to set and harden even underwater. The combination of limestone and clay, when heated and ground, produces a powder that, when mixed with water, forms a paste that hardens and binds materials together. This process is known as hydration and is the basis for the production of hydraulic cement.

Explanation
The correct answer is December 2, 1981. This is the only option that provides a specific date for Britney's birthday. The other options only mention the month and year without specifying the exact day.