A variable name in the programming language Visual Basic must begin with a letter (uppercase or lowercase) possibly followed by letters, digits (0–9), and various special characters. How many different Visual Basic variable names of length up to five are possible that consist of letters and digits and end in a digit?

translate k to n and reflect across the line containing jk.

step-by-step explanation: it is d

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

16.80 times .20= 3.36

step-by-step explanation: