Which expression is equivalent to 1/5×15: 5÷15, 1÷5, 15÷5, 15÷1

What is the y-intercept of the line given by the equation

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

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account