Grandpa Ernie is shrinking! Over the past 4 years, his height decreased by a total of 2.4 . It decreased by the same amount each year.

What was the change in Grandpa Ernie's height each year?

(just comment the answer please)

The trigonometric ratios sine and secant are reciprocals of each other

To decrease an amount by 16% what single multiplier would you use

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