Use a parametrization to express the area of the surface as a double integral. Then evaluate the integral. The lower portion cut from the sphere x2 + y2 + z2 = 4

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%

What is the slope of the line (-7,2) (4,6)

Need so much on this one how many yards?