Counting Principle: A student number system for a county requires
that the student number be 4 characters.
The first 3 characters are any single digit number,
and cannot repeat, and the last character must be a
letter. How many unique student numbers are
possible?

a. 260,000
b. 18,720
c. 131,040
d. 315,160

Which of these tools or constructions is used to inscribe a hexagon inside a circle?

Someone answer asap for ! 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

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)