The weights of tennis balls are normally distributed, with the mean being 5.15 ounces and the standard deviation being 0.10. What percentage of the balls weigh within one standard deviation of the mean?

Keisha makes a large sandwich for a family picnic she takes 1/2 of them the sandwich to the picnic her family eats 3/8 of the whole sandwich what fraction of the whole sandwich does keisha bring back from the picnic

True or false look at the picture pls : /

Quick graph the line for y+2=32(x+4) on the coordinate plane. does anyone know the cordinates will mark brainliest.