Question

Help me plz!!!.......

Answer 1

7.5^2+4.9^2
= 80.26
Square root of 80.26 = 8.96 ≈ 9
Cos 55.8 (9)
= 5.10 cm

Answer 2

`AB^(2) =AD^(2) +BD^(2)`

`AB^(2) =(7.5)^(2) +(4.9)^(2)`

`AB=√(80.26)`

`=8.96`

ΔABC tan C=AB/BC

⇒ tan 55.8= 8.96/BC ⇒BC= 8.96/tan 55.8

BC=x= 6.09

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Hope it helps...

Have a great day!!