The shape of the long-run average cost curve is best explained by the

• A. law of diminishing returns
• B. law of returns to scale
• C. cost of fixed inputs
• D. cost of variable inputs

Which of the following halogens is liquid at room temperature?

• A. lodine
• B. Chlorine
• C. Bromine
• D. Fluorine

The main impact of Islamic values on social life of the people of West Africa is the

• A. Performance of Salah by Muslims
• B. Modification of polygamy in line with Islamic principles
• C. Adoption of Arabic words in many languages
• D. Avoidance of alcoholic drink in public places

The extra commission for pledging full settlement of the wholesaler to the manufacturer?

• A. Warehousing
• B. Quality Control
• C. Financing
• D. Bulk -breaking

A major benefit a debtor can derive from using a credit facility is?

• A. better service
• B. goodwill
• C. convenience
• D. control

Nigeria's foreign policy is guided by the principle of

• A. military dominance
• B. economic self-sufficiency
• C. national interest
• D. territorial expansion

In the question below choose the word(s) or phrase(s) which best fills(s) the gap(s): The Board has been having .... series of meeting lately

• A. some
• B. a
• C. a lot of
• D. many

Through which of the following processes does solar energy warm the earth;s surface?

• A. Refraction
• B. Convection
• C. Conduction
• D. Radiation

(a)

In the diagram, < PTQ = < PSR = 90°, /PQ/ = 10 cm, /PS/ = 14.4 cm and /TQ/ = 6 cm. Calculate the area of the quadrilateral QRST.

(b) Two opposite sides of a square are each decreased by 10% while the other two are each increased by 15% to form a rectangle. Find the ratio of the area of the rectangle to that of the square.

The north pole of a magnet can never be separated from the south pole because of the property knowledge as?

• A. magnetic octopole
• B. magnetic monopole
• C. magnetic dipole
• D. magnetic quadrupole