The earth is said to be 4,540,000,000 years old.
estimate the age of the earth by writing it in the form
of a single digit times an integer power of 10.

the answer is 8

step-by-step explanation:

3.14 x 8x8

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

or