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course Phy 231
8/27 6:30
A1)*********************************************
Question: `q001. If you are earning money at the rate of 8 dollars / hour and work for 4 hours, how much money do you make during this time? Answer in such a way as to explain your reasoning as fully as possible. A solution to this problem appears several lines below, but enter your own solution before you look at the given solution.
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Your solution: (type in your solution starting in the next line)
Take 8 and multiply it by 4 thus 32 dollars is the answer.
confidence rating #$&*: (Type in a number from 0 to 3, indicating your level of confidence in your solution.
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3
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Self-critique (if necessary): (If you believe your solution matches the given solution then just type in 'OK'.
OK
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Self-critique Rating: (If you believe your solution matches the given solution then just type in 'OK'.
OK
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Question: `q002. If you work 12 hours and earn $168, then at what rate, in dollars / hour, were you making money?
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Your solution: (type in your solution starting in the next line)
You would make 14 dollars per hour, take 168 and divide by 12.
confidence rating #$&*:: (Type in a number from 0 to 3, indicating your level of confidence in your solution.
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3
Self-critique (if necessary): (If you believe your solution matches the given solution then just type in 'OK'.
OK
Self-critique Rating: (If you believe your solution matches the given solution then just type in 'OK'.
OK
A2)
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Question: `q003. If you are earning 8 dollars / hour, how long will it take you to earn $72? The answer may well be obvious, but explain as best you can how you reasoned out your result.
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Your solution: (type in your solution starting in the next line)
It would take 9 hours, you would divide $72 by 8.
confidence rating #$&*:
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3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q004. Calculate (8 + 3) * 5 and 8 + 3 * 5, indicating the order of your steps. Explain, as best you can, the reasons for the difference in your results.
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Your solution: (type in your solution starting in the next line)
First add 8 and 3 then multiply by 5, the answer is 55 via order of operations.
First multiply 3 and 5 then add 8, the answer is 23 via order of operations.
confidence rating #$&*:
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3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q005. Calculate (2^4) * 3 and 2^(4 * 3), indicating the order of your steps. Explain, as best you can, the reasons for the difference in your results. Note that the symbol '^' indicates raising to a power. For example, 4^3 means 4 raised to the third power, which is the same as 4 * 4 * 4 = 64.
First 2*2*2*2=16 then take 16 and multiply by 3, thus the answer is 48.
First take 4*3=12 then raise 2 by 12, thus the answer is 4096.
confidence rating #$&*:
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3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
#### I was not sure about the exponent at first whether you added or multiplied it.
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Self-critique Rating:
#### 3
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Question: `q006. Calculate 3 * 5 - 4 * 3 ^ 2 and 3 * 5 - (4 * 3)^2 according to the standard order of operations, indicating the order of your steps. Explain, as best you can, the reasons for the difference in your results.
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Your solution:
3^2=9 then multiply 3*5=15 4*9=36 then 15-36= -21.
Multiply 4*3=12 then square it 12^2=144, then multiply 3*5=15, take 15-144= -129.
confidence rating #$&*:
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3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q007. Let y = 2 x + 3. (Note: Liberal Arts Mathematics students are encouraged to do this problem, but are not required to do it).
• Evaluate y for x = -2. What is your result? In your solution explain the steps you took to get this result.
• Evaluate y for x values -1, 0, 1 and 2. Write out a copy of the table below. In your solution give the y values you obtained in your table.
x y
-2 -1
-1 1
0 3
1 5
2 7
Plugged the x values in the problem and got a y value.
The graph resembled a linear graph.
confidence rating #$&*:
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3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q008. Let y = x^2 + 3. (Note: Liberal Arts Mathematics students are encouraged to do this problem, but are not required to do it).
• Evaluate y for x = -2. What is your result? In your solution explain the steps you took to get this result.
• Evaluate y for x values -1, 0, 1 and 2. Write out a copy of the table below. In your solution give the y values you obtained in your table.
x y
-2 7
-1 4
0 3
1 4
2 7
Plugged in the x values into the equations and was given the y values as a result.
The graph is a parabola.
confidence rating #$&*:
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3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q009. Let y = 2 ^ x + 3. (Note: Liberal Arts Mathematics students are encouraged to do this problem, but are not required to do it).
• Evaluate y for x = 1. What is your result? In your solution explain the steps you took to get this result.
• Evaluate y for x values 2, 3 and 4. Write out a copy of the table below. In your solution give the y values you obtained in your table.
X y
1 5
2 7
3 11
4 19
Plugged in the x values into the equations and was given the y values as a result.
The graph is Exponential.
confidence rating #$&*:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q010. If you divide a certain positive number by 1, is the result greater than the original number, less than the original number or equal to the original number, or does the answer to this question depend on the original number?
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Your solution:
The number is equal to the original number.
confidence rating #$&*:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q011. If you divide a certain positive number by a number greater than 1, is the result greater than the original number, less than the original number or equal to the original number, or does the answer to this question depend on the original number?
The number will get smaller.
confidence rating #$&*:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q012. If you divide a certain positive number by a positive number less than 1, is the result greater than the original number, less than the original number or equal to the original number, or does the answer to this question depend on the original number?
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Your solution:
The number is greater than the original number.
confidence rating #$&*:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
3
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Self-critique (if necessary): If you are sure your solution matches the given solution, and/or are sure you completely understand the given solution, then just type in 'OK'.
OK
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Self-critique Rating:
OK
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Question: `q013.
I was not sure about the exponent at first whether you added or multiplied it.
Referring to question 5 about the multiplying exponents.
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Self-critique (if necessary):
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Self-critique rating:
OK
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Question: `q013.
I was not sure about the exponent at first whether you added or multiplied it.
Referring to question 5 about the multiplying exponents.
"
Self-critique (if necessary):
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Self-critique rating:
#*&!
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