Verified Answer :

it means 1.8 × 10 to the tenth power. the E is a ten are you working with scientific notation

For this case we have an expression of the form:
 \(a * e (b)\)
 We can rewrite this expression in scientific notation as:
 \(a * 10 ^ b\)
 Where,
 a: coefficient of scientific notation
 b: base ten exponent
 We then have the following expression:
 \(1.8e10\)
 Rewriting we have:
 \(1.8 * 10 ^ {10}\)
 Answer:
 \(1.8e10 = 1.8 * 10 ^ {10}\)