Given the equation of two lines how can i distinguish if these lines are parallel, perpendicular, or neither?

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

What is the absolute value of the complex number -4-sqrt2i

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%