What is the perimeter of the outside edge of the frame?

What are the soultion(s) to the quadratic equation 40- x^2=0

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars