15. A security code used to consist of two odd digits, followed by four even digits. To allow more codes to
be generated, a new system uses two even digits,
followed by any three digits. If repeated digits are
allowed, the increase in the number of possible codes
is ? Note: zero is considered an even number.
A) 6,393,600
B) 9,375
C) 3,125
D) 15,625
What is the answer?

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212