HELP PLZZZ 3. You have four credit cards. each has a balance of $450.00, but their credit limits are $800.00, $1,200.00, $1,300.00, and $1,500.00. paying off and closing which card would decrease your debt ratio? a. the $1,500.00 limit card

b. the $800.00 limit card

c. the $1,200.00 limit card

d. the $1,300.00 limit card

4. you pay off the 800.000 credit limit card from problem #3 what happens to your debt ratio

answer: you need the equation in the question so i can answer it

step-by-step explanation:

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