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3 years ago

The cost of a taxi journey is

Mathematics

1 answer:

svetlana [45]3 years ago

6 0

Answer:

its C

Step-by-step explanation:

it's because 3x7 is 21 add 4 to that its 25 and that's your answer

You might be interested in

One person wants to get a 95% z-confidence interval with a margin of error of at most 15 based on a population standard deviatio

Bess [88]

Answer:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample

$\mu$ population mean

$\sigma=60$ represent the population standard deviation

n represent the sample size (variable of interest)

Confidence =95% or 0.95

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

And on this case we have that ME =15, and we are interested in order to find the value of n, if we solve n from equation (1) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (2)

The critical value for 95% of confidence interval is provided, $z_{\alpha/2}=1.96$ , replacing into formula (2) we got:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

6 0

3 years ago

the radius and height of a right circular cone are in the ratio of 5:12 and its volume is 107800 cube cm find its height

zubka84 [21]

Answer:

this is the answer what i found

3 0

3 years ago

!!!URGENT!!!

suter [353]

Use the slope formula y2-y1/x2-x1

3-(-7)/1-(-1) = 10/2 = 5

To find the y-intercept:

y=5x+b

3=5(1)+b

3 = 5+b

-5 -5

-2=b

The equation of the line that passes through (-1,-7) and (1,3) is

y=5x-2

5 0

3 years ago

6.45 and 10.2 how does the estimate compare to the exact product

MrMuchimi

While estimating you would round the decimals and you would think in terms of how would the answer look like when you multiply 64 with 10... 640ish..and then you think about the decimals a little,,, soyou will put decimal after 64... and that will give you 64.0 or something ...While the exact answer id 65.79... Close enough.
Hope I helped..
Please mark the brainliest if I did help!

5 0

3 years ago

Nancy is planning a birthday party for her coworker, Sarah. She realizes that there are 10 medical assistants and 8 nurse assist

olchik [2.2K]

So buy 10 sandwiches and 2 pizzas

6 0

3 years ago