Question

Can someone help me out with this

Answer 1

`AB=4.41`

Explanation:

Use the cosine ratio,
`cosine=(adjacent)/(hypotenuse)` . Insert the values:

`cos25=(4)/(x)`

Isolate x. Multiply both sides by x:

`x*(cos25)=x*((4)/(x))\\\\x*cos25=4`

Divide both sides by cos 25:

`(x*cos25)/(cos25)=(4)/(cos25)\\\\x=(4)/(cos25)`

Insert into a calculator:

`x=4.414`

Round to the nearest hundredth:

`x=4.41`

Done.