A normally distributed data set has a mean of O and a standard deviation of 0.5. Which is closest to the percent of values between -0.5 and 0.5?

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.