How many passwords can we generate of lengths from 1 to 5 if we have 27 symbols数值题

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 As children learn to count, they often count wrong.  For example, they don't immediately understand order irrelevance. This refers to the fact that 

Question text A school is setting up activity packages that include a combination of books and puzzles.There are 4 different books and 3 different puzzles available. Student 1:"I was asked to calculate how many packages can include 1 book and 1 puzzle. I used the multiplicative principle: 4 × 3 = 12."Answer 1 Question 45[select: , The student is incorrect; the additive principle should have been used and the correct result is 7., The student is correct; the multiplicative principle applies and the result is 12., The student is incorrect; combinations should have been used and the total is 6.] Student 2:"I was asked to calculate how many packages can be made with just 1 item (either a book or a puzzle). I used 4 × 3 = 12."Answer 2 Question 45[select: , The student is correct; the multiplicative principle gives 12, which is accurate., The student is incorrect; combinations apply here and the answer is 6., The student is incorrect; the additive principle should be used here. The correct total is 7.] Student 3:"I was asked to calculate how many packages can include 2 books and 1 puzzle. I did C(4,2) × C(3,1) = 6 × 3 = 20."Answer 3 Question 45[select: , The student is incorrect; the combinations are correct but the total was evaluated incorrectly. The correct result is 18., The student is correct; combinations and multiplication give 20., The student is incorrect; permutation should have been used, and the correct value is 24.]

A "Yes" or "No" survey has 8 questions. Determine how many different ways there are to complete the survey if at least one question must be answered:(C:1)

Section A: Read the text and answer the questions. Brutalism is an architectural style, introduced in the 1950s. It uses exposed concrete to create geometric structures with a grey appearance. Concrete buildings are often criticised as cold and ugly, lacking the warmth of stone or the smooth feel of steel. However, concrete, as a building material, has unique characteristics. It is extremely flexible when wet, and is adapted to create interesting shapes. Many urban public buildings, such as universities, have also used concrete as the main material to indicate strength and permanence. Instead of keeping Brutalist buildings, many are being demolished to make space for modern styles. However, this does not acknowledge the cultural history of these buildings, and is not sustainable. Fill in the gap with ONE WORD from the paragraph. 1. Brutalist architecture included exposed concrete, which gave a cold Answer Question 1[input] .

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