Regroup to express the number in a different way. 71,830 = 6 ten thousands + * thousands + 8 hundreds + 3 tens

what is the * equal to??

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat

In the diagram, bc¯¯¯¯¯∥de¯¯¯¯¯ . what is ce ? enter your answer in the box.