Cedric is using the TVM Solver on his graphing calculator as shown below to
determine the future value of $4800 after it has earned compound interest for
a certain number of years.
N=6
ev 4800
PMT=0
FU=
P/Y=1
CY=12
PMT:ENE BEGIN
According to what Cedric has entered into the TVM Solver, for how many
years will the $4800 earn compound interest?

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

after 1 year: 221 deer

step-by-step explanation:

30% of 170 is 51. 170+51=221