Evaluate x-7; x=23 expression for the given value(s)of the variable(s).

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?