Which quadratic rule represents the data in the table?
x –1 0 1 2 3
y -4 -5 -4 -1 4

a. y = –2x^2 + 5
b. y = –x^2 + 5
c. y = x^2 – 5
d. y = x^2 + 5
me i literally been doing this problem for 30 minutes, i think its d but my math doesn't go with it..

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)