PLease help i will give brainliest

What is the length x of the side of the triangle below? (hint: use the cosine function)

To run the physics cart, the fan speed of the cart is manipulated. this is the (blank) variable. the cart accelerates due to the speed of the fan. acceleration is therefore the (blank) variable. a “constant” is a parameter that stays the same regardless of the variables. one parameter of the cart that is held constant is the (blank) .

The mantle is made up of which structural zones?