Find the Cardinal number of the set of all solutions to x^2=100

Abag contains 3 red marbles 4 white marbles and 5 blue marbles if one marble is drawn from the bag what is the probability that the marble will be blue

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

Suppose that g(x)=f(x+9) which statement best compares the graph of g(x) with the graph of f(x)