Jack's goal is to lose 4.25 pounds every month. If he keeps this up, how much weight will he have lost after 9.5 month round to the nearest hundredth

The parabola opens: y=√x-4 (principal square root) up down right left

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.