The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 49 ounces and a standard deviation of 10 ounces. Use the standard deviation rule, also known as empirical rule. a) 68% of the widget weights lie between what %?
b) What percentage of the widget weights lie between 28 and 61 ounces?
c) What percentage of the widget weights lie below 83?

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Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units

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