When a number is increased by 21%, the result is 102. what is the original number to the nearest tenth?

84.30

Step-by-step explanation:

Let the number = x

x + 21/100 x = 102             Combine the left hand side.

x + 0.21x = 102                  Add the left

x(1 + 0.21) = 102                 Combine

1.21x = 102                         Divide by 1.21

1.21x/1.21=102/1.21

x = 84.2795     To the nearest 1/10

x = 84.30

step-by-step explanation:

answers available in this download

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step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v