3 years ago

What is 35% of 130 write your answer in

Mathematics

1 answer:

lara [203]3 years ago

4 0

Answer:

45.5

Step-by-step explanation:

....................

You might be interested in

If a light bulb manufacturing company wants to estimate, with 99% confidence, the mean life of compact fluorescent light bulb

Reptile [31]

Answer:

We need at least 217 compact fluorescent light bulbs

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many compact fluorescent light bulbs need to be selected?

We need at least n bulbs, in which n is found when $M = 175, \sigma = 1000$

$M = z*\frac{\sigma}{\sqrt{n}}$

$175 = 2.575*\frac{1000}{\sqrt{n}}$

$175\sqrt{n} = 2575$

$\sqrt{n} = \frac{2575}{175}$

$\sqrt{n} = 14.71$

$\sqrt{n}^{2} = (14.71)^{2}$

$n = 216.5$

We need at least 217 compact fluorescent light bulbs

4 0

3 years ago

Read 2 more answers

Mrs McDonald spent 24.65 at a yard sale on Saturday. on Sunday she went to another sales and spent 14.95 more than she did on Sa

Brilliant_brown [7]

The answer is 39.60 all you have to do is add the 2 numbers together.

3 0

3 years ago

Read 2 more answers

Mandy increased the amount of protein she eats every day from 48 g to 54 g. By what percentage did Mandy increase the amound of

Nikolay [14]

The answer to your question is 12.5%

3 0

3 years ago

Hey cutie I need the answer ASAP

Vesnalui [34]

Answer:

Step-by-step explanation:

3 0

3 years ago

What is 50% more than %9.30

Klio2033 [76]

Answer:

13.95

Step-by-step explanation:

3 0

3 years ago