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kramer
3 years ago
14

9 cows can eat all the grass in a field in 21 days. How many days would it take for 3 cows?

Mathematics
1 answer:
Oksanka [162]3 years ago
7 0

Answer:

63 days

Step-by-step explanation:

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Two students start a club the first week of school. Each member invites three new members the second week of school. Each of the
Mekhanik [1.2K]
I'll just make a manual computation on how 1 member recruits his members until week 5. Then multiply the sum by 2.
                                old      new
1:   1
2:   1 x 3 = 3 ⇒        1         3       *only new members recruit 3 more
3:   3 x 3 = 9 ⇒        4         9 
4:   9 x 3 = 27⇒     13       27
5: 27 x 3 = 81 ⇒    40       81

40 + 81 = 121. Total number of members under 1 founding member.

121 x 2 founding members = 242 total number of members within 5 weeks.
3 0
3 years ago
Read 2 more answers
Three balls are selected at random without replacement from an urn containing two white balls and four blue balls. Find the prob
guapka [62]

<u>Answer:</u>

P(3 blue) = 1/5

<u>Steps:</u>

P(3 blue) = 2/3 × 3/5 × 1/2

P(3 blue) = 6/30

P(3 blue) = 1/5

<em>that's 20%</em>

4 0
3 years ago
g Programs submitted by programs in a computer science course are examined for syntax errors and logic errors. Suppose 36% of al
Llana [10]

Answer:

The answer is below

Step-by-step explanation:

Let S denote syntax errors and L denote logic errors.

Given that P(S) = 36% = 0.36, P(L) = 47% = 0.47, P(S ∪ L) = 56% = 0.56

a) The probability a program contains both error types = P(S ∩ L)

The probability that the programs contains only syntax error = P(S ∩ L') = P(S ∪ L)  - P(L) = 56% - 47% = 9%

The probability that the programs contains only logic error = P(S' ∩ L) = P(S ∪ L)  - P(S) = 56% - 36% = 20%

P(S ∩ L) = P(S ∪ L) - [P(S ∩ L') + P(S' ∩ L)] =56% - (9% + 20%) = 56% - 29% = 27%

b) Probability a program contains neither error type= P(S ∪ L)' = 1 - P(S ∪ L) = 1 - 0.56 = 0.44

c)  The probability a program has logic errors, but not syntax errors =   P(S' ∩ L) = P(S ∪ L)  - P(S) = 56% - 36% = 20%

d) The probability a program either has no syntax errors or has no logic errors = P(S ∪ L)' = 1 - P(S ∪ L) = 1 - 0.56 = 0.44

6 0
3 years ago
Read 2 more answers
(please help me)The center of a circle is at (8, —8). One point on the circle is at (8, —3). What is the area of the circle? (Us
Serjik [45]

Answer:

it A or C depending on the site you use

Step-by-step explanation:

good luck

7 0
3 years ago
So I know the answer for 8 is 2.24, but I'm not sure how to get that!!
Furkat [3]
Multiply 15 and 24 then divide that answer by 11.2.
8 0
3 years ago
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