Which statement is true when considering a loan

Alicia puts $400 in a bank account. each year the account earns 5% simple interest. how much money will be in her bank account in six months?

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply