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3 years ago

In which quadrants does sin and cos have opposite signs.

1 answer:

8 0

Quadrants 2 and 4 because in quadrant 2, cosine is negative and sin is positive, while in quadrant 4, cosine is positive and sin is negative

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25% of all who enters a race do not complete. 30 haveentered.

nikklg [1K]

Answer:

The probability that exactly 5 are unable to complete the race is 0.1047

Step-by-step explanation:

We are given that 25% of all who enters a race do not complete.

30 have entered.

what is the probability that exactly 5 are unable to complete the race?

So, We will use binomial

Formula : $P(X=r) =^nC_r p^r q^{n-r}$

p is the probability of success i.e. 25% = 0.25

q is the probability of failure = 1- p = 1-0.25 = 0.75

We are supposed to find the probability that exactly 5 are unable to complete the race

n = 30

r = 5

$P(X=5) =^{30}C_5 (0.25)^5 (0.75)^{30-5}$

$P(X=5) =\frac{30!}{5!(30-5)!} \times(0.25)^5 (0.75)^{30-5}$

$P(X=5) =0.1047$

Hence the probability that exactly 5 are unable to complete the race is 0.1047

6 0

3 years ago

HELP I WILL GIVE YOU BRAINLIEST <br><br> Question: What is the solution to this quadratic?

Nataly_w [17]

(5,0) if it’s asking the solution or do you want the equation? Technically the solution would be where the parabola touched the x axis

7 0

3 years ago

Read 2 more answers

Write the set of points from −8 to −2 but excluding −3 and −2 as a union of intervals

Sauron [17]

If you're only dealing with integers, then the answer is:

[-8 , -3)

If you're dealing with real numbers, then the answer is:

[-8, -3)∪(-3, -2)

3 0

3 years ago

36.00x0.07 show explanation

makkiz [27]

Answer: 2.52

Step-by-step explanation: 36.00x0.07

36.00 is the same as 36

so, 36x0.07=2.52

5 0

2 years ago

If the probability of trowing a score of seven with 2 dices is ⅛ ,what is the probability of not throwing a score of seven

V125BC [204]

Answer:

7/8

Step-by-step explanation:

because 1 - ⅛ = 7/8. which would mean the answer is 7/8

3 0

3 years ago