The length is 20 and the width is 9. Hope this helps.
Answer:
37.62 degrees + 47.87 degrees = 85.49 degrees
Step-by-step explanation:
For this question we are trying to find the "absolute value" between these 2 numbers, because one of the numbers are negative and the other one is positive, we are going to add both of them together. That is how we got 85.49. In a different equation, we might have done something different.
Answer: 
Step-by-step explanation:
The surface area of a rectangular prism can be calculated with the following formula:

Where "l" is the length of the rectangular prism, "w" is the width and "h" is the height.
In this case you can say that the length, the width and the heigth of this rectangular prism, are the following:

Knowing these values, you can substitute them into the formula shown before:

Finally, you must evaluate in order to calculate the surface area of the rectangular prism.
You get that this is:

The answer is (f * g) (x) = 12x
65 + 10x < 120
x = 5 hours and he would have 5 dollars left