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gregori [183]
4 years ago
7

Please solution it allplease please please please please please ​

Mathematics
1 answer:
Dmitry_Shevchenko [17]4 years ago
8 0

3. Hypotenuse 8m, the usual 45/45/90 triangle sides in ratio 1:1:√2.  So we're 8/√2 = 4√2 from the wall.

Answer: 4√2 meters

4. 30/60/90 right triangle, sides in ratio 1:√3:2.  Hypotenuse 50m, we're after the side opposite 60, so 50/√3 = (50/3) √3

Answer: (50/3)√3 meters

5. 45/45/90 again, ratio 1:1:√2.  Leg 3 cm so hypotenuse 3√2

Answer: 3√2 cm

6. The altitude divides the triangle into two 30/60/90 triangles, ratio 1:√3:2.

The side length s of the original equilateral triangle is the hypotenuse and the altitude h is the long leg, so h= (√3/2) s.

Answer: a. 3√3 cm  b. 2√3 cm  c. 5√3 cm

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For safety reasons, 4 different alarm systems were installed in the vault containing the safety deposit boxes at a Beverly Hills
Evgen [1.6K]

Answer:

<em>99.93%</em>

Step-by-step explanation:

<u>Probability of Independent Events</u>

Given the probability of success of each detector is 0.84 independently of the others, their combined success/failure probability can be computed with the product rule.

We can calculate the required probability by using the binomial distribution, but it's easier to calculate the probability of the negated event an subtract from 1.

We want to know the probability that a least one of the 4 systems detects the occurrence of theft. That probability is the sum of the probabilities that one of them, two of them, three of them or all of them succeed. The negated event is that NONE of them actually detects the theft. Being p the individual probability of success, p=0.84. Being q the probability of failure, q=0.16.

The probability that none of the systems detect the theft is

P(0)=q^4=0.16^4=0.00065536

Thus, the probability that at least one of the systems detect the theft is

P(x\geq1)=1-P(0)=1-0.00065536=0.9993

That means a 99.93%

3 0
3 years ago
Which expression could be used to find the volume of the prism shown below?
cupoosta [38]

Answer:

V= 11*8*5

V= 88*5

V= 440 cm3

3 0
3 years ago
Does anyone know how to tell the difference between rational and irrational numbers?
Elan Coil [88]

Answer:

Rational numbers refers to a number that can be expressed in a ratio of two integers. An irrational number is one which can't be written as a ratio of two integers. Expressed in fraction, where denominator ≠ 0. Cannot be expressed in fraction.

Step-by-step explanation:

done

7 0
3 years ago
What’s the answer ??? (SOMEONE PLEASE HELP)
xxTIMURxx [149]
It's the first one. That is a perfect square polynomial, which, when factored, will give you the same binomial twice, or multiplicity 2.  It will factor to g(x)=(x+9) ^{2}, where the vertex (h, k), is (-9, 0).
5 0
3 years ago
Solve the equation 2x2 – 13x + 14 = 0 to the nearest tenth.
timofeeve [1]

Answer:

x=\frac{13+\sqrt{57}}{4},\:x=\frac{13-\sqrt{57}}{4}

x=5.1 , 1.4

Step-by-step explanation:

use quadratic equation

5 0
3 years ago
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