Question

100=0×5+1/2×a×5^2 answer these question?​

Answer 1

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100 = 0×5 +1/2 × a× 5²

100 = 1/2 × a × 25

200 = 25 a

200/25 = a

8= a

Answer 2

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$100 = 0 \times 5 + \frac{1}{2} \times a \times {5}^{2}$

$100 = 0 + \frac{25a}{2}$

$100 \times 2 = 25a$

$200 = 25a$

$a = \frac{200}{25}$

$a = 8$