Help me I'm giving 20 points

a²•b⁶ if a =½ and b=2 ?​

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. after tax the total is 45.99. what percentage of the subtotal is the total?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?