HELP PLS.
In scientific notation and simplify

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle?

One file clerk can file 10 folders per minute. a second file clerk can file 11 folders per minute. how many minutes would the two clerks together take to file 672 folders?

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?