Correct Answer: A. mixed farming

Correct Answer: C. cell

Correct Answer: A. 324

Explanation

\(x - \frac{3}{x^{2}} = x - 3x^{-2}\)

Let the power on x be t, so that the power on \(x^{-2}\) = 9 - t

\((x)^{t}(x^{-2})^{9 - t} = x^{3} \implies t - 18 + 2t = 3\)

\(3t = 3 + 18 = 21 \therefore t = 7\)

To obtain the coefficient of \(x^{3}\), we have

\(^{9}C_{7}(x)^{7}(3x^{-2))^{2} = \frac{9!}{(9 - 7)! 7!}(x)^{7}(9x^{-4})\)

= \(\frac{9 \times 8 \times 7!}{7! 2!} \times 9(x^{3}) = 324x^{3}\)

Correct Answer: B. manufacturing

Correct Answer: B. hydrogen sulphide

Correct Answer: A. farm owner

Explanation

Farm owner is the one who bears the risk of production in agricultural business, as they have the ultimate responsibility for the business's success or failure and make critical decisions that impact the farm's performance and profitability.

Correct Answer: D. burnt offerings

Explanation

(a) The objectives of establishing ECOWAS are:

(i) To promote co-operation and development in all fields of economic activity.

(ii) Raise the standard of living of its people.

(iii) To increase and maintain economic stability in the region.

(iv) To have regional economic co-operation.

(v) To abolish obstacles to the free movement of persons, services and capital between member states.

(vi) To harmonise monetary policies as required for the proper functioning of the community.

(vii) To eliminate customs duties and other charges of equivalent effect between member states in respect of importation and exportation of goods.

(viii) To promote sporting activities.

(ix) To maintain political stability.

(x) To help promote international unity.

(b) The Lake Chad Basin Commission was established for the following reasons:

(i) To maintain liaison with members with a view to more effective use of the waters of the basin.

(ii) To undertake development of underground water resources for multiple uses.

(iii) To enhance the agricultural potentials of Lake Chad Basin area for irrigation.

(iv) To contract and maintain dams, wells, boreholes, drainages and irrigation system.

(v) To control pollution of rivers and lakes.

(vi)To teach farmers modern farming methods.

(vii) To draw up common rules of navigation.

(viii) To undertake projects for control of flood and erosion.

(ix) To develop irrigation system for crop and livestock production.

Correct Answer: D. Hypothalamus

Explanation

The correct answer is hypothalamus. The hypothalamus is made of nervous tissue and is a part of all vertebrate brains, placing it as part of the nervous system. It also secretes a number of hormones that directly affect the pituitary gland, affecting a large number of bodily functions. In this way, the hypothalamus connects the nervous and endocrine systems and is part of both of them.

Correct Answer: A. supply of labour by farm families