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2 years ago

Read the numbers and decide what the next number should be. 20 30 40 50 60 70

2 answers:

6 0

They are asking for pattern recognition of a sequence of numbers. If you follow the pattern the next logical number will be 80

goldenfox [79]2 years ago

4 0

80 Because the numbers are going up by 10

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In which triangle is the value of x equal to tan−1(StartFraction 3.1 Over 5.2 EndFraction)? (Images may not be drawn to scale.)

FromTheMoon [43]

Answer:

The angle opposite to side with length 3.1 is x

The triangle in the attached figure

Step-by-step explanation:

we know that

In a right triangle the tangent of an angle x is equal to divide the opposite side to angle x by the adjacent side to angle x

In this problem we have

$x=tan^{-1}(\frac{3.1}{5.2})$

therefore

opposite side to angle x is 3.1 units

adjacent side to angle x is 5.2 units

The angle opposite to side with length 3.1 is x

see the attached figure to better understand the problem

3 0

2 years ago

Read 2 more answers

The lengths of a particular snake are approximately normally distributed with a given mean Mu = 15 in. and standard deviation Si

Liula [17]

Answer: 5%

Step-by-step explanation:

Let see that the snakes that are longer than 16.6 in are lomger than mean at 16.6-15=1.6 in

1.6:Sigma=1.6: 0.8=2 that means that all other snakes but longer than 16.6 in are inside +-2 Sigma. It is known that for normal distribution 95.4% of all snakes are inside +-2 Sigma

That means that 100%-95.4%=4.6% or about 5% of the snakes are longer than 16.6 in

7 0

2 years ago

Read 2 more answers

Suppose that Randy is an analyst for the bicyling industry and wants to estimate the asking price of used entry-level road bikes

padilas [110]

Answer: The lower limit of this confidence interval = $576.41

The upper limit of this confidence interval = $831.09

Step-by-step explanation:

Let $\mu$ be the population mean price of a used road bike.

As per given have,

n=11

Degree of freedom = 10

$\overline{x}=\$703.75$

s= $189.56

T-critical value for 95% confidence :

$t_{(df, \alpha/2)}=t_{(10,0.025)}=2.228$

Now, 95% confidence interval for μ, the mean price of a used road bike. will be :

$\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}$

$\$703.75\pm (2.228)\dfrac{189.56}{\sqrt{11}}$

$\$703.75\pm \$127.34$

$(\$703.75-\$127.34,\ \$703.75+\$127.34)$

$(\$576.41,\ \$831.09)$

Thus , the lower limit of this confidence interval = $576.41

The upper limit of this confidence interval = $831.09

3 0

2 years ago

If I rencently decreased my average number of products sold per week by 15% I now sell an average of 21.25 products per week. Pr

VladimirAG [237]

Alright, lets get started.

Suppose previously I was selling product per week = x

As per question, I have decreased my average number of product by 15 %

Means I have decreased number of product by : x * 15 % = x * 0.15 = 0.15 x

So, the new average product = x - 0.15 x = 0.85 x

As per given question, the new average product = 21.25

0.85 x = 21.25

Dividing by 0.85 in both sides

0.85 x / 0.85 = 21.25 / 0.85

x = 25

Hence it means, 25 products were selling previuosly. : Answer

Hope it will work :)

8 0

2 years ago

WHICH IS A TRUE STATEMENT BASED ON THE DOT PLOTS BELOW 10 POINTS

Nata [24]

Answer:

C. Set B has the greater range.

Step-by-step explanation:

We can start out with listing out each set of data in a way that makes it easier to work with.

Set A:

20,20,30,30,40,40,40,40,40,50,50,60,60,60

Set B:

10,10,20,20,20,30,30,30,30,40,50,50,60

We can start by trying to eliminate answer options; starting with D.

To get the mean of a set of data, we need to add all numbers in the data set and then divide by the number of dots on the plot.

For Set B: 10+10+20+20+20+20+30+30+30+30+40+50+50+60=420 then divide by number of dots (14) 420/14=30 The mean of Set B is equal to 30.

Solve the mean for Set A to compare. The mean is 41. D is not true so we can eliminate this answer choice.

We can look at the median of both sets so that we can eliminate answer choice B. The median is the middle most point in the set of data.

Set A median: 40

Set B median: 30

We can eliminate B because it does not have the greater median.

On to option C: range.

To find the range of each data set, we subtract the smallest number from the biggest number.

Set A: 60-20=40

Set B: 60-10= 50

Set B does in fact have a greater range than Set A. Answer choice C is the correct option.

6 0

2 years ago