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Zinaida [17]
2 years ago
14

Help fast please i’m bad with math

Mathematics
2 answers:
yKpoI14uk [10]2 years ago
8 0
I dont know but i think either B or A
jeyben [28]2 years ago
6 0

Answer:

FALSE, TRUE, FALSE, FALSE

Step-by-step explanation:

pi/2>2 - FALSE

3pi>9 - TRUE

2pi-1<5 - FALSE

pi+8<11 - FALSE

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The brand name of a certain chain of coffee shops has a 53% recognition rate in the town of Coffeeton. An executive from the com
sukhopar [10]

Answer:

B) 0.287

Step-by-step explanation:

For each Coffeeton resident, there are only two possible outcomes. Either they recognize the brand name, or they do not. The probability of a resident recognizing the brand name is independent of other residents. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

53% recognition rate in the town of Coffeeton.

This means that p = 0.53

Find the probability that exactly 4 of the 7 Coffeeton residents recognize the brand name.

This is P(X = 4) when n = 7. So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 4) = C_{7,4}.(0.53)^{4}.(0.47)^{3} = 0.287

So the anwer is:

B) 0.287

7 0
3 years ago
Read 2 more answers
Solve this equation 11/20 +x= 9/10
Sav [38]

Answer:

7/20

Step-by-step explanation:

\frac{11}{20}+x=\frac{9}{10} \\x=\frac{7}{20}

7 0
3 years ago
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A square has a diagonal length of 5 cm. The area of the squareiscm2. Round answer to the nearest tenths ifneeded.
Whitepunk [10]
\begin{gathered} \text{Diagonal}=5\operatorname{cm} \\ \text{Area}=\frac{D^2}{2} \\  \\ \text{Area}=\frac{(5cm)^2}{2} \\  \\ \text{Area}=\frac{25\operatorname{cm}^2}{2} \\  \\ \text{Area}=12.5\operatorname{cm}^2 \\ \text{The area of the square is 12.5 cm }^2 \end{gathered}

6 0
1 year ago
This table represents the proportional relationship between the number of boxes and the number magnetic cubes held by the boxes
ZanzabumX [31]

Answer:

B:125

Step-by-step explanation:

3 0
3 years ago
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Challenge A bag contains pennies, nickels dimes, and quarters. There are 50 coins in all of the
vova2212 [387]

Answer:

The bag contains $5.14

Step-by-step explanation:

18% of 50 = (.18)(50) = 9 pennies

40% of 50 = (.40)(50) = 20 dimes

2 more nickels than pennies = 9 + 2 = 11 nickels

40 coins so far, so 50 - 40 = 10 quarters

Total value:

9 x ($0.01) = $0.09  for pennies

20 x ($0.10) = $2.00 for dimes

11 x ($0.05) = $0.55 for nickels

10 x ($0.25) = $2.50 for quarters

Grand total value = $5.14

7 0
3 years ago
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