Question

What is the standard form of the number in the calculator’s display 2.3e-9.

Answer 1

2.3 times (e^-9)= 2.3 x (2.71828)^-9, e is a constant. taken here approximate one.

Answer 2

Here the e is denoting exponential/scientific notation. Most calculators use the uppercase E for exponential notation and the lowercase e for the constant.
\[2.3E-9 = 2.3 \times 10^{-9}\]

The exponent on 10 is negative, so move the decimal point 9 spaces left to get the number in standard form.

Answer 3

2.3*10 power negative 9

Answer 4

A small number