Bromine-82 has a half of about 35 hours. after 140 hour, how many milliliters of an 80 ml sample will remain? a,65ml b.20ml c.10ml d.5ml

Which of the following are parts of a sphere

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b