Find the 11th term of the geometric sequence 10, -40, 160

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Agraphic designer created a logo on eight and a half by 11 inch paper. in order to be placed on a business card, the logo needs to be one and 7/10 inches by 2 and 1/5 in. what is the scale factor of the dilation

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33