A manufactuer decided to mix two aluminum alloys, one is 20% alloy and the other is 60% alloy. How many tons of 20% alloy should he use to get a total of 100 tons of 28% aluminum alloy?

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.