fareEstimator.js

// Uber is building a Fare Estimator that can tell you how much your ride will cost before you request it.
// It works by passing approximated ride distance and ride time through this formula:
// (Cost per minute) * (ride time) + (Cost per mile) * (ride distance)
// where Cost per minute and Cost per mile depend on the car type.
// You are one of the engineers building the Fare Estimator, 
// so knowing cost per minute and cost per mile for each car type, 
// as well as ride distance and ride time, return the fare estimates for all car types. 
// Example
// For ride_time = 30, ride_distance = 7, cost_per_minute = [0.2, 0.35, 0.4, 0.45] 
// and cost_per_mile = [1.1, 1.8, 2.3, 3.5], 
// the output should be fareEstimator(ride_time, ride_distance, cost_per_minute, cost_per_mile) = [13.7, 23.1, 28.1, 38].
// Since:
// 30 * 0.2 + 7 * 1.1 = 6 + 7.7 = 13.7 30 * 0.35 + 7 * 1.8 = 
// 10.5 + 12.6 = 23.1 30 * 0.4 + 7 * 2.3 = 12 + 16.1 = 28.1 30 * 0.45 + 7 * 3.5 = 13.5 + 24.5 = 38
const fareEstimator = (ride_time, ride_distance, cost_per_minute, cost_per_mile) => {
    const costs = []
    for (let i = 0; i < cost_per_mile.length; i++) {
        costs.push((ride_time * cost_per_minute[i] + ride_distance * cost_per_mile[i]).toFixed(2))
    }
    return costs
}

console.log(fareEstimator(30, 7, [0.2, 0.35, 0.4, 0.45], [1.1, 1.8, 2.3, 3.5]));