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Solutions to other tests:
Mathematics for the Digital Age
and
Programming in Python
>>> Second Edition
Test 4
- 1.
- (a), (b), (c), (e), (f), (g)
- 2.
- (a), (b), (c), (d), (f), (g)
- 3.
- D
- 4.
- (a) T (b) T (c) T (d) T
- 5.
- C
- 6.
- B
- 7.
- A
- 8.
- D
- 9.
- C
- 10.
- (a) T (b) F (c) T (d) F
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- 11.
- (a), (b), (c)
- 12.
- (a) T (b) T (c) T
- 13.
- (a) F (b) T (c) F
- 14.
- (b)
- 15.
- D
- 16.
- (b), (c)
- 17.
- A
- 18.
- D
- 19.
- (a), (b), (c)
- 20.
- B
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- 21.
- 1/(1 – (–1/2)) =
1/(3/2) = 2/3
- 22.
9 + 99 + ... + 9<--[30 9s]-->9 =
10 + 100 + ... + 10<--[30 0s]-->0 - 30 =
1<--[30 1s]-->10 - 30 =
1<--[28 1s]-->1080
- 23.
- <![CDATA[def randString01(n):
'''Returns a randon string of 0s and 1s of length n'''
s = ''
for count in range(n):
s += str(randint(0,1))
return s
]]>
- 24.
- <![CDATA[days = 0
percentSaw = 0
while percentSaw < 90:
percentSaw += 0.15*(100 - percentSaw)
days += 1
print(days)
]]>
- 25.
- <![CDATA[def addPowersOfX(x, n):
p = 1
sumP = 0
while n >= 0:
sumP += p
p *= x
n -= 1
return sumP
x = 100
print(addPowersOfX(x, 10) * addPowersOfX(x*x, 5))
]]>
- 26.
- <![CDATA[def areaUnderParabola(a, b, n):
h = (b-a)/n
s = 0.0
i = 0;
while i < n:
x = a + i*h + h/2
s += x*x*h
i += 1
return s
]]>
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