What is the number six million, thirty thousand expressed in scientific notation?

Tom drove 206 miles in 3.9 hours. estimate his average speed.

$5400 is? invested, part of it at 11? % and part of it at 8? %. for a certain? year, the total yield is ? $522.00. how much was invested at each? rate?

Given a normal distribution with µ=20 and σ = 4, what is the probability that x> 24 x< 24 x< 24 or x> 24