What is 2.085 times 10 to the 6th power in standard form

Landon wrote that 3−2.6=4. which statement about his answer is true?

How many square centimeters of wrapping paper will be used to wrap the shoe box?

Acredit union pays 5% annual interest, compounded daily, on saving deposits. find the value after one year of $500 deposited in this account. a-$20.40 b-$25.64 c-$520.40 d-$525.64