If 1 + 13 = 2 and 9 + 4 = 1 then what is 5 + 11? What situation is this true?

Blank × 10-3 is 2,000 times greater than 1.9 × 10-6. it is also blank times greater than 9.5 × 10-4.

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

Taking algebra two apex courses and need with these questions