Correct Answer: C. reporters

Correct Answer: D. the native authorities were already well organized

Correct Answer: B. 9 x 10^-7m

Explanation

C = \(\frac {\varepsilon_o\ A}{d}\)

10^-2 x 10^-6 = \(\frac {9 \times 10 ^{-12}}{d}\) x 10^-4

= 9 x 10^-7m

Explanation

(a)The concept of diminishing marginal utility holds that as additional unit of a commodity is consumed, it adds less and less to total utility and later adds nothing to total utility. Further consumption leads to negative values, then total utility diminishes as reflected in the total curve dropping downwards.

(b) A consumer's utility is maximized when the marginal utility per amount spent on a product is equal to the marginal utility per amount spent on any other product. It can be written mathematically asMux=Muy=Mz

Px Py Pz

Where MUx, Muy, Muz represent the marginal utilities of products x, y, .z

while Px, Py, Pz represent their prices respectively.

In the case of one commodity, a consumer will maximize his utility when the MU of that commodity equals the price of the commodity, e.g. MUx= Px

Correct Answer: D. the loss should be borne by Mr. Ya'aqub

Correct Answer: C) an increase in investment

Explanation

This question is asking which of the options will lead to an initial increase in the aggregate demand of an economy. The options are an increase in the price of energy, a decrease in consumer wealth, an increase in investment, and an increase in the wage rate.

Aggregate demand refers to the total demand for goods and services in an economy. It is influenced by several factors, including consumption, investment, government spending, and net exports.

Option A, an increase in the price of energy, will likely lead to a decrease in consumption and investment, as people and businesses will have to spend more money on energy, leaving them with less to spend on other goods and services. Therefore, it will lead to a decrease in aggregate demand, not an increase.

Option B, a decrease in consumer wealth, will also lead to a decrease in consumption, as people will have less money to spend. This will cause a decrease in aggregate demand, not an increase.

Option D, an increase in the wage rate, could lead to an increase in consumption, as workers will have more money to spend. However, it could also lead to an increase in production costs, which could lead to a decrease in investment and a decrease in aggregate demand.

Option C, an increase in investment, is the correct answer. An increase in investment will lead to an increase in production and income, which will lead to an increase in consumption. This increase in consumption will cause an increase in aggregate demand.

Therefore, an increase in investment leads to an initial increase in the aggregate demand of an economy.

Correct Answer: C. in sight

Explanation

The phrase that best fills the gap is A. at sight.

• shoot at sight (or shoot on sight) means to shoot someone or something as soon as it is seen, without warning or delay. This fits the context where guards are instructed to shoot every moving thing due to constant harassment.

Let's look at why the other options don't fit:

• B. by sight: Means judging by what one sees or by means of seeing. It doesn't imply immediate action.

• C. in sight: Means visible or within view. While a thing must be in sight to be shot, shoot in sight is not an idiomatic expression for immediate action upon seeing.

• D. off sight: This is not a standard idiom. Out of sight means not visible, which is the opposite of what's intended.

The complete sentence with the correct phrase would be: Owing to the constant harassment of the populace by armed robbers, all night guards have been instructed to shoot at sight every moving things.

Correct Answer: A. synecdoche

Correct Answer: D. increase the level of efficiency

Correct Answer: A. rise in price