Which of the following is equivalent to the quadratic equation below after completing the square?
x^2+4x=0
a. (x+4)^2=4
b.(x+2)^2=16
c.(x+4)^2=8
d.(x+2)^2=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.

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !