4boys step off from the same place. if their steps measures 16cm,28cm,40cm and 77cm respectively.at what distance from the starting point will they step together again?

  6160 cm

Step-by-step explanation:

The distance will be the least common multiple of these numbers. That can be figured by looking at their prime factors and choosing the smallest product that contains them all.

  16 = 2⁴

  28 = 2²·7

  40 = 2³·5

  77 = 7·11

The factors we need to include are 2⁴, 5, 7, 11. The product of these is

  2⁴ × 5 × 7 × 11 = 6160

The boys will step together again after 6160 cm.

Ok so here are the simple rules of doing it (very easy) cause I’m not doing it all so . when multiplying a power with The same base keep the base but add the exponents. Dividing, keep the base (if their the same if not then its already simplified same with multiplication) but SUBTRACT the exponents. Also keep the parenthesis if it’s a negative number base.

I’ll do a few.

11) a^10.           11b) 5^4

12) (-2)^2.        

13) 10^2.          13b) s^6

14) -4s^5(t^6) <- [Im not sure of this one)

15) x^3(y^3)