In class, I wasn't paying attention and our teacher gave us problems like this: -2tg(-4θ)

I have no idea what (tg) is and what I need to do here, does anyone have any idea?

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Which of the following three dimensional figures has a circle as it’s base