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623, 529

Step-by-step explanation:

Let's rewrite the problem: 6.8% of what number is 42,400?

Represent the problem as an equation.

0.068 * n = 42,400 (6.8% = 0.068)

0.068/0.068 = 0

42,400/0.068 = 623,529.4117647059

Round this value to the nearest whole number to receive: 623, 529

617647

Step-by-step explanation:

6.8% = 42 400

Divide 42 400 by 6.8 to get 1%

1%     = 6176.47058823529

Multiply this by 100 to get 100%

100% = 617647.0588

We can check it by doing 617647.0588 * 6.8% = 42 400

Nearest whole number= 617647

A /  [ pi r^2 ]   =   θ / [ 2pi ]           [ multiply both sides by pi r^2  ]

A  =  [ θ / 2 ]  r^2  =    (1/2)r^2 θ