Radiatation treatment is aplied to a field size of 8 centameters at a depth 2.5 centimeters below the skin surface. if the treatment head is positioned 80 centimeters from the skin, find the targeted field size to the nearest millimeter

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Which of these triangle pairs can be mapped to each other using two reflections?

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.