What is the circumference of a circle with a diameter of 14ft (please help)

How to write 3 tenths and 5 tenths as a decimal

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

Which term applies to agb and dge? a. obtuse b. supplementary c. complementary d. vertical