Jack deposited $1,400 in his bank account. After 3 years, the account is worth $1,694. Find the simple interest rate the account earned. A. 5% B. 8%
C. 7.25% D. 7%

D. 7%

Step-by-step explanation:

c. 4 1/4 pounds

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!