Which place is the 1 in?

13.49

The one is in the tens place.

HOPE THIS HELPED! :D

It is in the tens. Don't confuse this with the 'tenths' which is where the 4 is and is after the decimal. When it ends with 'ths' it is after the decimal. Like if it were 113.46, the first one would be in the hundreds, not the hundreths.

The height of the tower is 141.74 meters.

Step-by-step explanation:

See the attached diagram.

Let the position of the tower os AB with A as the base and B is the top.

Now, angle of elevation of point B from point C is 50°, and the from point D is 40°, and hence, CD = 50 meters,

Now, from Δ ABC,

⇒ .......... (1)

Again, from Δ ABD,  

⇒ .......... (2)

Now, DC = AD - AC  

⇒ 50 = 1.192x - 0.839x

⇒ 50 = 0.353x

⇒ x = 141.74 meters.

Hence, the height of the tower is 141.74 meters. (Answer)