For a short time after a wave is created by wind, the height of the wave can be modeled using y=a sin 2pi/t, where a is the amplitude t is the period of the wave in seconds. how many times over the five seconds does the graph predict the wave to be 2 feet high

I'll give brainliest if you answer right : )

Find the length of the diagonal of the rectangle. round your answer to the nearest tenth. || | | 8 m | | | | 11 m

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%