Why is (-5) to the 28th power positive but without parentheses it is negative?

= (10+5^2)*((5*-2)+9-3^3)/2

= (10+25)*((5*-2)+9-3^3)/2

= (35)*((5*-2)+9-3^3)/2

= 35*((5*-2)+9-3^3)/2

= 35*((-10)+9-3^3)/2

= 35*(-10+9-3^3)/2

= 35*(-10+9-27)/2

= 35*(-1-27)/2

= 35*(-28)/2

= 35*-28/2

= -980/2

= -490

Step-by-step explanation:

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)