Answer the following question.
Jason bought a new bookcase that can hold a maximum of 80 pounds of weight. Jason has 70 hardcover books that each weigh half a pound, 30 textbooks that each weigh 2 pounds, and 3 knick-knacks that each weight 6 pounds. How many pounds over the bookcase's weight limit is this total collection of items?
Step-by-step reasoning process: First find the total weight of the hardcover books: 70 books * .5 pound / book = 35 pounds. Then find the total weight of the textbooks: 30 books * 2 pounds / book = 60 pounds. Then find the total weight of the knick - knacks: 3 knick - knacks * 6 pounds / knick - knack = 18 pounds. Then find the total weight of all the items: 35 pounds + 60 pounds + 18 pounds = 113 pounds. Then subtract the bookcase's weight limit: 113 pounds - 80 pounds = 33 pounds.
The answer is 33.

Answer the following question.
Salem loves to write poems, and she always stores her poem in a creativity box kept safely in her home library. Last week, she created a poem with 20 stanzas. If each stanza has 10 lines, and each line has 8 words, calculate the total number of words in the poem.
Step-by-step reasoning process: If each line that Salem created in her poem has 8 words, the total number of words in a stanza, which is 10 lines, is 8 words / line * 10 lines / stanza = 80 words / stanza. With 20 stanzas, each containing 80 words per stanza, the total is 80 words / stanza * 20 stanzas = 1600 words in all the stanzas(poem).
The answer is 1600.

Answer the following question.
Austin and Jake start descending from the 9th floor of a building at the same time. Austin uses the elevator and Jake uses the stairs, descending 3 steps every second. The stairs have 30 steps across each floor. If the elevator will take a minute to get to ground level, how many seconds later will Jake get to the ground floor?
Step-by-step reasoning process: Jake has to descend 30 steps on 9 floors for a total of 9 * 30 = 270 steps. He descends 3 steps every second so he will descend 270 steps in 270 / 3 = 90 seconds. Austin will get down after only a minute (60 seconds) so Jake will get down 90 - 60 = 30 seconds later.
The answer is 30.

Answer the following question.
A cleaning company produces two sanitizer sprays. One spray kills 50% of germs, and another spray kills 25% of germs. However, 5% of the germs they kill are the same ones. What percentage of germs would be left after using both sanitizer sprays together?
Step-by-step reasoning process: After the first spray kills 50% of germs, there will be 100 - 50 = 50% left. The second spray kills 25%, but 5% have already been killed by the 50% spray, so it kills 25 - 5 = 20%. After the second spray kills 20% of the remaining germs, there will be 50 - 20 = 30% left.
The answer is 30.