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babunello [35]
2 years ago
13

Please help I don’t understand this can you please help me.

Mathematics
1 answer:
nordsb [41]2 years ago
6 0

Answer:

b : 42 degrees

Step-by-step explanation:

I went through every option and divided them by 2, then multiplied what I got by 6 and added 12, and then and added that to the original option to see if it equals 180.... basically it's just a guess and check question

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s the last book a person in City Upper A read a discrete random​ variable, continuous random​ variable, or not a random​ variabl
Oxana [17]

Answer:

Not a random variable

Step-by-step explanation:

The last book a person read in City A is not a random variable because it is not a number as there is no numerical description for the outcome of this experiment.

Thus, the last book read by someone in City A is not a random variable.

4 0
2 years ago
Read 2 more answers
Find the area of the trapezoid. A trapezoid has a base of 8 meters, a height of 6 meters, and a top side length of 4 meters.
ICE Princess25 [194]

Answer:

  • 36 m²

Step-by-step explanation:

  • A = 1/2(b₁ + b₂)h
  • A = 1/2(8 + 4)*6 = 36 m²
8 0
3 years ago
Work out<br>1/8<br>of 760<br><br>please help​
Mariana [72]

Answer: 95

Step-by-step explanation:

Think of 1/8 times 760 as 760/8 because it’s the same thing.

3 0
3 years ago
An example problem in a Statistics textbook asked to find the probability of dying when making a skydiving jump.
MArishka [77]

Answer:

(a) 0.999664

(b) 15052

Step-by-step explanation:

From the given data of recent years,  there were about 3,000,000 skydiving jumps and 21 of them resulted in deaths.

So, the probability of death is \frac{21}{3000000}==0.000007.

Assuming, this probability holds true for each skydiving and does not change in the present time.

So, as every skydiving is an independent event having a fixed probability of dying and there are only two possibilities, the diver will either die or survive, so, all skydiving can be regarded as is Bernoulli's trial.

Denoting the probability of dying in a single jump by q.

q=7\times 10^{-6}=0.000007.

So, the probability of survive, p=1-q

\Rightarrow p=1-7\times 10^{-6}=0.999993.

(a) The total number of jump he made, n=48

Using Bernoulli's equation, the probability of surviving in exactly 48 jumps (r=48) out of 48 jumps (n=48) is

=\binom(n,r)p^rq^{n-r}

=\binom(48,48)(0.999993)^{48}(0.000007)^{48-48}

=(0.999993)^{48}=0.999664 (approx)

So, the probability of survive in 48 skydiving is 0.999664,

(b) The given probability of surviving =90%=0.9

Let, total n skydiving jumps required to meet the surviving probability of 0.9.

So, By using Bernoulli's equation,

0.9=\binom {n }{r} p^rq^{n-r}

Here, r=n.

\Rightarrow 0.9=\binom{n}{n}p^nq^{n-n}

\Rightarrow 0.9=p^n

\Rightarrow 0.9=(0.999993)^n

\Rightarrow \ln(0.9)=n\ln(0.999993) [ taking \log_e both sides]

\Rightarrow n=\frac {\ln(0.9)}{\ln(0.999993)}

\Rightarrow n=15051.45

The number of diving cant be a fractional value, so bound it to the upper integral value.

Hence, the total number of skydiving required to meet the 90% probability of surviving is 15052.

3 0
3 years ago
Does 10cm, 30cm, and 15cm form a triangle????
Helen [10]

Answer:

No, because the 3 angles of a triangle must add up to 180 degrees and yours only add up to 55

Step-by-step explanation:

7 0
2 years ago
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