If z has a standard normal distribution then approx 95%of all values fall between z scores of -2 and 2. give the positive value of x precise to two decimal points

Katie wants to collect over 100 seashells. she already has 34 seashells in her collection. each day, she finds 12 more seashells on the beach. katie can use fractions of days to find seashells. write an inequality to determine the number of days, dd, it will take katie to collect over 100 seashells.