Adescription of different houses on the market includes the following three variables.
which of the variables is quantitative?
a) the square footage of the house
b) the monthly gas bill
c) the monthly electric bill
d) all of the above

D) all of the above

Explanation:

All the variables which can be represented using numerical values are called quantitative variables. In the given instance, we have variables related to different houses, as following:

square footage of the house - this will always be represented in numerical terms and thus it is a quantitative variable.the monthly gas bill - this will always be represented using currency, as will be represented in 'n' number of currency, and therefore quantitative variable.the monthly electric bill - as same as above this will be represented in 'n' number of dollars and therefore, it is also quantitative variable.

Therefore, all of the above are correct options.

The correct answers are Black Markets, Underground and Higher.

Explanation:

Black markets are illegal markets that emerge in response to price controls. A few buyers are able to obtain the good at the open-market price; the rest must resort to illegal means. The additional demand is met by underground suppliers selling at much higher prices.

Government of a country does not support or encourage such activities. People usually buy such products at market rate when the product is low in demand and sell it in black at higher prices when the demand of the product is high.