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3 years ago

Please I need some answers a few is fine

Mathematics

2 answers:

allochka39001 [22]3 years ago

6 0

Answer:

i) 1 ii) 3.16227766017 iii)10 iv)31.6227766017

Step-by-step explanation:

tekilochka [14]3 years ago

6 0

Answer:

I. 1

ii. 100

iii.10000

iiii.1000000000

i.1

ii.3.16228

iii.10

iiii.31.6228

Step-by-step explanation:

Read more on polynomials;

brainly.com/question/2833285

7 0

3 years ago

Curtis lives 9 miles away from Jean. If Curtis can ride his bike at a constant rate of 12 miles per hour, how many minutes would

sasho [114]

It will take Curtis 45 minutes to ride his bike from his house to Jean's house.

4 0

3 years ago

An automobile manufacturer would like to know what proportion of its customers are not satisfied by the service provided by the

zheka24 [161]

Answer:

The sample size needed if the margin of error of the confidence interval is to be about 0.04 is 18.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Past studies suggest this proportion will be about 0.15

This means that $p = 0.15$

Find the sample size needed if the margin of error of the confidence interval is to be about 0.04

This is n when M = 0.04. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.04 = 1.96\sqrt{\frac{0.15*0.85}{n}}$

$0.04\sqrt{n} = 1.96\sqrt{0.15*0.85}$

$\sqrt{n} = \frac{1.96\sqrt{0.15*0.85}}{0.04}$

$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.15*0.85}}{0.04})^{2}$

$n = 17.5$

Rounding up

The sample size needed if the margin of error of the confidence interval is to be about 0.04 is 18.

8 0

3 years ago

PLEASE HELP 20 POINTS

labwork [276]

Answer:

Step-by-step explanation:

You can simply count the number of unit cubes.

There are 11 cubic units.

6 0

3 years ago

Two bees have found a food source. The first bee’s path to the hive follows the line . The second bee’s path follows the line y

choli [55]

The coordinate of the hive is the point of interaction of the two lines.
We have the two equations:
$y=4/5x\\y=-2x+3\\\text{By substitution we get:}\\4/5x=-2x+3\\\text{Solving the above equation for x we get:} x=15/14\\\text{Then }y=4/5\times15/14=6/7\\\text{The coordinates of the hive are then :}(15/14,6/7)$

6 0

3 years ago