Answer:
Step-by-step explanation:
If we think about a right triangle, we get that the hypotenuse is 24ft or the length of the ladder. The base of the ladder is 15ft away from the building which is the leg of the right triangle. The screenshot is the diagram (my drawing isn't that good lol:))
Thus we can use cosine function with the angle between the ladder and the ground since we need to find the angle and we get
and 
The angle is 51.3 degrees hope that helps!
Answer:hi
Step-by-step explanation:plz like and brainliest i am noob I really need this plz
We can separate the shape into a rectangle and a square
the area of the rectangle :
the area of the square:
the area of the whole shape:
hope this helps
Given that I no not see any explanation in the previos answer, I think you can benefit of this.
Exothermic refers only to the fact that the reaction releases energy in the form of heat when occurs. So, the enthalpy is higher at start and lower and the end.
Seen in this way, you can deduct that the change in enthalpy is negative, which is what the third option says.
Answer:
12
Step-by-step explanation:
43
