oceanography.js

const secsArray = [
  5.2,
  6.0,
  2.8,
  10.0,
  3.6,
  8.0,
  15.0,
  11.5,
  1.5,
  9.5,
];

const speedOfSound = 1500;

const alphabet = "abcdefghijklmnopqrstuvwxyz";

const formula = (echoTime, speedOfSound) => {
  return (echoTime * speedOfSound) / 2;
}

for (let i = 0; i < secsArray.length; i++) {
  const echoTime = secsArray[i];
  const distance = formula(echoTime, speedOfSound);
  console.log(`${alphabet[i]}: ${distance}`);
}