You  bought  jeans  last  week  for  $55.  today  you  see  that  the  jeans  are  on  sale  for  $40.  what  is  the percent  decrease  of  the  price? (explain ! )

25 ! the line of best fit is h = 5a + 86. predict the height at age 16. show your work.

Solve 2^x=32 and rewrite this equation in a logarithmic form

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g