An apprentice works on 4 different jobs. The first takes 7.25 hours, the second takes 12.25 hours, the third takes 13.50 hours, and the fourth job takes 6.25 hours. How many total hours did the apprentice work?
What will be an ideal response?
39.25
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What does a gas-forming agent do when added to concrete?
What will be an ideal response?
Items are inspected for flaws by two quality inspectors. If a flaw is present, it will be detected by the first inspector with probability 0.9, and by the second inspector with probability 0.7. Assume the inspectors function independently.
a. If an item has a flaw, what is the probability that it will be found by both inspectors? b. If an item has a flaw, what is the probability that it will be found by at least one of the two inspectors? c. Assume that the second inspector examines only those items that have been passed by the first inspector. If an item has a flaw, what is the probability that the second inspector will find it?
The most common jackets for fiberglass duct wrap are ASJ and _____.
a. FSK b. SST c. TMM d. CAG
What happens to water as it is heated?
a. Its density increases. b. Its density decreases. c. Its density remains the same. d. It absorbs air.