Select all the options that describe the characteristics of a relational database: a. It stores large amounts of data
b. It is for efficiency and effectiveness
c. It is a system many components
d. It is a single software
e. It is using entities and relationship
f. It is to have data redundancy

Ithink it is a thermometer.

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.

Answercomposite key;