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zloy xaker [14]

3 years ago

14

Suppose that a number written as a decimal has an infinite number of non–repeating digits after the decimal point. what is this

number called?

1 answer:

marishachu [46]3 years ago

7 0

This kind of number is known as an irrational number

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A concrete stepping stone measures 20 square inches. What is the area of 30 such stones

Natalka [10]

The answer is 600. 30•20

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3 years ago

Suppose that the probability that any particle emitted by a radioactive material will penetrate a certain shield is 0.01. If 10

AnnyKZ [126]

Answer:

a)P=0.42

b) $n\geq 297$

Step-by-step explanation:

We have a binomial distribution, since the result of each experiment admits only two categories (success and failure) and the value of both possibilities is constant in all experiments. The probability of getting k successes in n trials is given by:

$P=\begin{pmatrix}n\\ k\end{pmatrix} p^k(1-p)^{n-k}=\frac{n!}{k!(n!-k!)}p^k(1-p)^{n-k}$

a) we have k=2, n=10 and p=0.01:

$P=\frac{10!}{2!(10!-2!)}0.01^2(1-0.01)^{10-2}\\P=\frac{10!}{2!*8!}0.01^2(0.99)^{8}\\P=45*0.01^2(0.99)^8=0.42$

b) We have, $1-(1-p)^n=P$ , Here P is the probability that at least one particle will penetrate the shield, this probabity has to be equal or greater than 0.95. Therefore, this will be equal to subtract from the total probability, the probability that the particles do not penetrate raised to the total number of particles.

$1-0.99^n\geq 0.95\\0.99^n\leq 1-0.95\\0.99^n\leq 0.05\\n\geq 297$

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3 years ago

When you open a stepladder, you use a brace on each side of the ladder to lock the legs in place. Explain why the triangles form

navik [9.2K]

Answer:

so it can have a better balence

Step-by-step explanation:

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3 years ago

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SVETLANKA909090 [29]

Answer:

<h2>Sorry mate I am not able to understand ur question ❓❓❓❓ . sorry mate next time I can give u the answer.</h2>

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3 years ago

What’s the length of the mid segment of a trapezoid with bases of length 16 and 24

blagie [28]

Answer:

20

Step-by-step explanation:

The midsegment of a trapezoid is calculated as

$\frac{sumofbases}{2}$ = $\frac{16+24}{2}$ = $\frac{40}{2}$ = 20

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3 years ago