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Answer:
8.5cm
Step-by-step explanation:
AC² = AB² + BC² (Acc. to pythogoras theorem)
AC² = 4² + 7.5²
AC² = 16 + 56.25
AC² = 72.25
AC² = 8.5²
By comparing bases of like powers,
AC = 8.5cm
Hope this helps!
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