Deandre is 49 years old. Gabrielle is 31 years old. How many years ago was Deandre's age 4 times Gabrielle's age?

Write and solve a real word problem that involves determining distance on a coordinate plane

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point

How would you find the height of points on the circle? the topic is trigonometry.