Ascientist wants a 90 ounce acid solution with a concentration of 12%. she has concentrations of 8% and 18%. how much of each solution must she use to get the desired concentration?

You are on a cycling trip around europe with friends. you check the weather forecast for the first week. these are the temperatures for the week. sun mon tues wed thurs fri sat 16°c 20°c 24°c 28°c 28°c 23°c 15°c what is the mean temperature forecast for the week?