What's the results for √(-4--3)²+(3-2)² , i found 2 but i think it's false

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. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.