Money that is collecting interest in a bank account triples in value every 20 years.
When the account was
opened, it had 81, or 34 dollars in it. After 60 years, the
account balance has tripled 3 times, increasing by a factor of 33.
It now has a balance of 34. 33. Expressed as a power, how much money, in
dollars, is in the account after 60 years?
O A. 3^7
O B. 3^3
C. 3^12
D. 9^7

is it... b...? ;-;

Step-by-step explanation:

plz plzzz dont be mad at mehh if wrong :P

^O^                  

^﹏^

A just did the test :)

Step-by-step explanation:

is there answer choices?

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