How do you find LCM? please give me a good explanation gotta test tmr and i totally forgot how to!!

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

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2