Explain how an abacus works doing addition and subtraction arithmetic.
cylinders left to right, “100” then “20” then “5” then “1”. the “100” has a quantity of 5 tokens. the “20” has a quantity of 4 tokens. the “5” has a quantity of 3 tokens. the “1” has a quantity of 4 tokens.

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.

Astraight water slide is 175 feet above ground and is 200 feet long. what is the angle of depression to the bottom of the slide?

What is the value of x? enter your answer in the box.