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3 years ago

How to round 16.15549 to the nearest tenth?

Mathematics

2 answers:

lions [1.4K]3 years ago

8 0

Answer

16....... my bad it's 16.2 I miscalculated

Step-by-step explanation:

To round a number to the nearest tenth , look at the next place value to the right If it's 4 or less, just remove all the digits to the right. If it's 5 or greater, add 1 to the digit in the tenths place, and then remove all the digits to the right.

bagirrra123 [75]3 years ago

4 0

Answer:

16.2

Step-by-step explanation:

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What is the distance between Nicholas’s school and the post office?

Lelechka [254]

Answer:

B. 5.2

Step-by-step explanation:

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2 years ago

Exhibit 9-2 The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the cu

Diano4ka-milaya [45]

Answer:

At a .05 level of significance, it can be concluded that the mean of the population is significantly more than 3 minutes.

Step-by-step explanation:

We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.

At the null hypothesis, we test if the mean is of at most 3 minutes, that is:

$H_0: \mu \leq 3$

At the alternative hypothesis, we test if the mean is of more than 3 minutes, that is:

$H_1: \mu > 3$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

3 is tested at the null hypothesis:

This means that $\mu = 3$

The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute.

This means that $n = 100, X = 3.1, \sigma = 0.5$

Value of the test statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{3.1 - 3}{\frac{0.5}{\sqrt{100}}}$

$z = 2$

P-value of the test and decision:

The p-value of the test is the probability of finding a sample mean above 3.1, which is 1 subtracted by the p-value of z = 2.

Looking at the z-table, z = 2 has a p-value of 0.9772.

1 - 0.9772 = 0.0228

The p-value of the test is of 0.0228 < 0.05, meaning that the is significant evidence to conclude that the mean of the population is significantly more than 3 minutes.

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3 years ago

What is a picture of a rectangle with opposite sides that are not congruent

Sophie [7]

A trapezoid is that.

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3 years ago

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The expression 2l + 2w is used to find the perimeter of a rectangle with length l and width w.

aalyn [17]

2 (18cm) + 2 (3cm) = perimeter

36cm + 6cm = P

The answer is 42cm

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3 years ago

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The curve with equation y2 = 5x4 − x2 is called a kampyle of eudoxus. find an equation of the tangent line to this curve at the

Vesnalui [34]

To find the tangent line we will need the slope of the tangent at x=-1 (the x-coordinate of the point given). We find the slope by using the derivative of the curve.

Th curve given is $y^{2} =5 x^{4} - x^{2}$ which can be solved for y by taking the root of both sides. We obtain $y=(5 x^{4}- x^{2} ) ^{1/2}$

We find the derivative using the chain rule. Bring down the exponent, keep the expression in the parenthesis, raise it to 1/2 - 1 and then take the derivative of what is inside.

$y’=(1/2)(5 x^{4} - x^{2} )^{-1/2}(20 x^{3} -2x)$

Next we evaluate this expression for x=-1 and obtain:
$\frac{20(-1)^{3} -(2)(-1)}{2 \sqrt{5(-1 ^{4}-(-1 ^{2}) } }= \frac{-20+2}{2 \sqrt{5-1} }=-18/4=-9/2$

So we are looking for a line through (-1,2) with slope equal to -9/2. We use y=mx+b with m=-9/2, x=-1 and y=2 to find b.

$2=(-9/2)(-1)+b$
2-(9/2)=b
b=-5/2

So the tangent line is given by y=(-9/2)x+(-5/2)

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3 years ago