Tim has a checking account with $1,200 remaining after paying bills after several months. he wants to earn interest on
this money rather than keep extra money he does not need for monthly bills in his checking account. over the next
year, he thinks he might need to withdraw $100 one or two times. his bank requires $250 to open a regular savings
account, $500 for a one-year cd, $750 for a two-year cd, and $1,000 to open a money market account. decide which
choice would be the best for his situation.
open a regular savings account
open a money market account
open a one-year cd
open a two-year cd

answer: 12   they all have at least 28 days

step-by-step explanation: haha

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