which sampling method divides the population up into sections, then chooses sll the members from the selected sections to cstudy

Write a polynomial for a third-degree polynomial with leading coefficient -4

Isabelle is mixing red and blue paint to make purple paint she adds 3/10 of a fluid ounce of red to 12/25 of a fluid ounce of blue to make 1 1/30 fluid ounces of purple how many fluid ounces of red paint ounces of red paint will she need to make 3 fluid ounces of purple paint

Find the cube roots of 8i. write the answer in a + bi