The amounts of plastic waste generated in a region for 2 years were 32,400,000 tons and 20,300,000 tons. what was the total plastic waste generated in the region for these 2 years, expressed in scientific notation? 52.7 ⋅ 1014 tons 52.7 ⋅ 107 tons 5.27 ⋅ 107 tons 5.27 ⋅ 1014 tons

How to do this , and can some one explain

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0