Answer:
B) Selection of a subset of a population to represent the entire population
Step-by-step explanation:
In research, it is often impractical to study the whole population, so a sample of the population is taken to represent the whole population.
The answer is A. 20 you know that the equation plus the angle that equals 46 are equal to 90 degrees so..... use the formula
2x+4+46=90
simplify by adding 4 and 46
2x+50=90
subtract 50 from both sides
2x=40
divide each side by 2
x=20
and that's how you get your answer
Power rules for both quotient and product sums are useful to simplify large exponential form (of the same base)
The difference is in the rule. For quotient sum, the powers are subtracted, while for product sum, the powers are added up.
An example for quotient sum

Using the principle of simplifying fractions, we can cancel out ten 7s from both numerator and denominator, leaving us with only three 7s on the numerator which gives us

. This working out could be simplified by doing

An example for product sum

. There is a total of eleven 9s if we were to work out the product sum the long way. This could be simplified by doing