The least-squares regression model y=-3.4 +5.2z and correlation coefficient r 0.66 were calculated for a set of bivariate data with variables a and y Vhich of the following is closest to the proportion of the variation in y that cannot be explained by the explanatory varisble?

What is 140% of 25? because i need

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

Maddie's rectangular kitchen has an area of 10 square yards and a length of 3 3/4 yards. how many yards wide is maddie's kitchen?