Factor completely: 2a2 + a − 28
a. (2a − 7)(a + 4)
b. (2a+7)(a-4)
c. (2a-4)(a+7)
d. prime

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Which statements about these triangles is true

Yesterday i ran 5 miles. today, i ran 3.7 miles. did my percent increase, decrease or is it a percent error? plz i need