3 years ago

PLZ HELP URGENT!!!!!!!

Mathematics

2 answers:

Jobisdone [24]3 years ago

8 0

Answer:

t=1

Step-by-step explanation:

GrogVix [38]3 years ago

5 0

Answer:

t=1

Step-by-step explanation:

You might be interested in

(PLEASE HELP)

Delvig [45]

The answer is 40

91+49=140
180-140=40

4 0

3 years ago

Read 2 more answers

The quality control manager at a computer manufacturing company believes that the mean life of a computer is 120 months, with a

IrinaK [193]

Answer:

P(X<118.81)=0.0803

Step-by-step explanation:

Assuming the distribution for the mean life is approximately normal, with mean 120 months and variance 64 months^2, we can calculate the parameters for a sampling distribution with sample size = 89 computers.

The sampling distribution mean will be equal to the mean for a single computer:

$\mu_{89}=\mu=120$

The standard deviation will be adjusted by the sample size as:

$\sigma_{89}=\sqrt{\sigma^2/n}=\sqrt{64/89}=\sqrt{0.719}=0.848$

With these parameters, we can calculate the z-score for X=118.81.

$z=\dfrac{X-\mu}{\sigma}=\dfrac{118.81-120}{0.848}=\dfrac{-1.19}{0.848}=-1.403$

Then, the probability that the mean of a sample of 89 computers is less than 118.81 months is:

$P(X$

7 0

3 years ago

What times 3 equal 19? I know it’s a repeating number but what would I put on top?

AlexFokin [52]

You would put a Vinculum on top of it

5 0

3 years ago

Round square root 50 to the nearest hundredth

stiks02 [169]

$\sqrt{50} =\sqrt{25\times2} =\sqrt{5^2\times2} =5\sqrt{2} \approx \boxed{\bf{7.07}}$

7 0

3 years ago

What is the following product? 4V7•4V7•4V7•4V7 A 4(4V7) B 4v7 C 7^4 D 7

SVETLANKA909090 [29]

Answer:

Option (4)

Step-by-step explanation:

Let x = $\sqrt[4]{7}$

$\sqrt[4]{7}\times \sqrt[4]{7}\times \sqrt[4]{7}\times \sqrt[4]{7}$ = (x)(x)(x)(x)

= $x^{1+1+1+1}$

= x⁴

Now we substitute the value x = $\sqrt[4]{7}$

x⁴ = $(\sqrt[4]{7})^4$

x⁴ = 7

Therefore, Option (4) will be the answer.

3 0

3 years ago