5.4 x 10 to the 3rd power to standard form

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

Which of the following shows the length of the third side, in inches, of the triangle below