URGENT! PLEASE HELP An air balloon is connected to the ground by a cable with a length of 200 meters inclined at a 60 degree angle. How high off the ground is the air balloon? (please show work)

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.