Afood company reduced the amount of salt in one of their food products from 700 milligrams to 630 milligrams. what is the percent decrease in the amount of salt in the food product?

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