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The statement "CAPTCHAs can be used as a form of signature to create a valid contract in e-commerce. " is true. It is <span>a program or system intended to distinguish human from machine input, typically as a way of thwarting spam and automated extraction of data from websites.</span>
Answer:
hour = float(input("Enter hour:"))
minute = float(input("Enter minute:"))
second = float(input("Enter second:"))
am_pm = input ("Enter AM or PM:")
if am_pm == "AM":
if hour == 12:
hour = 0
seconds_since_midnight = ((3600 * hour) +(minute *60) + second)
elif am_pm == "PM":
seconds_since_midnight = ((3600 * (hour+12)) +(minute *60) + second)
print("Seconds since midnight:", int(seconds_since_midnight))
Explanation:
The point here is when PM is chosen, you need to add 12 to the hour. I added <em>elif</em> part to satisfy this. Moreover, since the output is in integer format, you may need to apply type casting for <em>seconds_since_midnight</em> variable.
Answer:
A. A quiet room
Explanation:
Because if you open the windows the will be noise
a huge room will echoe
a room with air conditioning will make noise
Answer:
Let's convert the decimals into signed 8-bit binary numbers.
As we need to find the 8-bit magnitude, so write the powers at each bit.
<u>Sign -bit</u> <u>64</u> <u>32</u> <u>16</u> <u>8</u> <u>4</u> <u>2</u> <u>1</u>
+25 - 0 0 0 1 1 0 0 1
+120- 0 1 1 1 1 0 0 0
+82 - 0 1 0 1 0 0 1 0
-42 - 1 0 1 0 1 0 1 0
-111 - 1 1 1 0 1 1 1 1
One’s Complements:
+25 (00011001) – 11100110
+120(01111000) - 10000111
+82(01010010) - 10101101
-42(10101010) - 01010101
-111(11101111)- 00010000
Two’s Complements:
+25 (00011001) – 11100110+1 = 11100111
+120(01111000) – 10000111+1 = 10001000
+82(01010010) – 10101101+1= 10101110
-42(10101010) – 01010101+1= 01010110
-111(11101111)- 00010000+1= 00010001
Explanation:
To find the 8-bit signed magnitude follow this process:
For +120
- put 0 at Sign-bit as there is plus sign before 120.
- Put 1 at the largest power of 2 near to 120 and less than 120, so put 1 at 64.
- Subtract 64 from 120, i.e. 120-64 = 56.
- Then put 1 at 32, as it is the nearest power of 2 of 56. Then 56-32=24.
- Then put 1 at 16 and 24-16 = 8.
- Now put 1 at 8. 8-8 = 0, so put 0 at all rest places.
To find one’s complement of a number 00011001, find 11111111 – 00011001 or put 0 in place each 1 and 1 in place of each 0., i.e., 11100110.
Now to find Two’s complement of a number, just do binary addition of the number with 1.
