Answer:
z = 123.9
Step-by-step explanation:
We can use trigonometric functions, because we have a right triangle. We now the adjacent and opposite side of the angle we are interested in, so we can use the tan function.
tan 20 = opposite/ adjacent
tan 20 = 45.1/z
Multiply each side by z
z* tan 20 = 45.1 /z * z
z * tan 20 =45.1
Divide each side by tan 20
z = 45.1 / tan 20
z=123.9112316
To one decimal place,
z = 123.9
