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Elan Coil [88]
3 years ago
6

What is 25+30 pleas help me

Mathematics
1 answer:
olganol [36]3 years ago
3 0
Your answer would be 55
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A company makes rubber rafts. 12% of them develop cracks within the first month of operation. 27 new rafts are randomly sampled
rewona [7]

The probability that the number of tested rafts that develop cracks is no more than 3 is <u>.00006</u>.

The true proportion, p for the population is given to 0.12.

Thus, the mean, μ, for the sample = np = 27*0.12 = 3.24.

The sample size, n, given to us is 27.

Thus, the standard deviation, s, for the sample can be calculated using the formula, s = √{p(1 - p)}/n.

s = √{0.12(1 - 0.12)}/27 = √0.003911 = 0.0625389.

We are asked to calculate the probability that the number of tested rafts that develop cracks is no more than 3, that is, we need to calculate P(X ≤3).

P(X ≤ 3)

= P(Z ≤ {(3 - 3.24)/0.0625389) {Using the formula z = (x - μ)/s}

= P(Z ≤ -3.8376114706)

= .00006 {From table}.

Thus, the probability that the number of tested rafts that develop cracks is no more than 3 is <u>.00006</u>.

Learn more about sampling distributions at

brainly.com/question/15507495

#SPJ4

8 0
1 year ago
F(t)=t^2-3t<br> g(t)=2t+1<br> find f(g(t))
statuscvo [17]

Answer:

f (2t + 1) = 4t^{2} - 2t - 2

7 0
2 years ago
The diagram shows Maha's garden.
Liono4ka [1.6K]

Answer:

perimeter = 71.4 m

Step-by-step explanation:

using the Pythagorean theorem:

CD² = 15.3² + (24 - 13.6)² = 234.09 + 108.16 = 342.25

CD = √342.25 = 18.5

perimeter = 24 + 15.3 + 13.6 + 18.5 = 71.4 m

4 0
3 years ago
Whats the answer? A, B, C, or D??
vesna_86 [32]

Answer:

C is the correct answer

6 0
3 years ago
Read 2 more answers
2. If the area of a square is 49 inches squared, what is the side length?
Troyanec [42]
The side length should be 7 because 7*7=49 and the area of a rectangle is A=length*width
3 0
2 years ago
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