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erik [133]
3 years ago
11

A standard deck of cards contains 52 cards. thirteen of the cards are spades, and three of the spades are face cards. in all, th

e deck contains 12 face cards. when drawing one card at random from a shuffled deck, let a = {getting a face card} and b = {getting a spade}. what is the probability a or b happens? answer as a fraction in the format
Mathematics
1 answer:
Colt1911 [192]3 years ago
8 0
Total number of cards = 52
Total number of spades = 13
Total number of face cards that are not spades = 3 x 3 = 9

Total number of spades or face cards = 13 + 9 = 22

P(a or b) = 22/52 = 11/26

Answer: 11/26
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2 years ago
Population Growth The population P (in thousands) of Oriando,Florida from 1980 through 2009 can be modeled by p = 130e0.0205t,wh
svetoff [14.1K]

Answer: a) 236,000.

b) 2021

Step-by-step explanation:

Given : Population Growth The population P (in thousands) of Oriando,Florida from 1980 through 2009 can be modeled by p = 130e^{0.0205t}    (1)

where t = 0 corresponds to 1980.

Then , for 2009

t= 2009-1980=29

a. ⇒The population of Phoenix in 2009 =  p = 130e^{0.0205(29)}

p = 130e^{0.5945}

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Hence, the population of Orlando in 2009 was about 236,000.

b) Substitute p= 300 in (1) , we get

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2.3077= e^{0.0205t} (Divide both sides by 130)

Taking Natural log on both sides,

\ln(2.3077) = 0.0205t\\\\\Rightarrow\ t=\dfrac{\ln(2.3077)}{0.0205}

t=\dfrac{0.836251357528}{0.0205}=40.7927491477\approx41

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6 0
3 years ago
Factor strings for 36
Marina CMI [18]
Factor strings for 36:

6 x 6
2 x 18
3 x 12
4 x 9
2 x 2 x 3 x 3
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Hope that helped :D
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Answer:

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Step-by-step explanation:

bc i know

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