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3 years ago

Which is the graph of f(x) = 4^x

Mathematics

2 answers:

larisa [96]3 years ago

5 0

Answer:

it C

Step-by-step explanation:

UkoKoshka [18]3 years ago

5 0

Answer:

left

Step-by-step explanation:

well power never cross x-axis and right side always higher

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The figure shows a circle circumscribed around a triangle. what is constructed first when creating the circle?

vampirchik [111]

Answer:

Option B is right

Step-by-step explanation:

We have in a triangle there are some properties inherent.

One is the perpendicular bisectors of all sides are concurrent.

These three concur at a point called the circumcentre of the triangle.

When we draw perpendicular bisector for a side AB, we get that all points on the perpendicular bisector are equidistance from A and B.

When we take the point of intersection of perpendicular bisector of AB and BC, we have the intersecting point S(say) is equidistant from A and B and also from B and C

In short this is equidistant from all 3 vertices and hence is centre of circumcicle of triangle ABC

5 0

3 years ago

Read 2 more answers

What is the length of the hypotenuse?<br>

Klio2033 [76]

It will be 5 because 4^2+3^2= 16+9=25 and then square root of 25=5

5 0

4 years ago

Read 2 more answers

I need help!!! Please

BlackZzzverrR [31]

Answer:

Step-by-step explanation:

5 0

3 years ago

.11 A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken, and the diameters are found to b

Troyanec [42]

Answer:

The 99% confidence interval for the mean diameter of pieces from this machine is between 0.93 and 1.07.

Step-by-step explanation:

Sample mean:

Sum of all values divided by the number of values. So

$M = \frac{1.01+0.97+1.03+1.04+0.99+0.98+0.99+1.01+1.03}{9} = 1$

Sample standard deviation:

Square root of the sum of the differences between each value and the mean, divided by the 1 less than the sample size. So

$s = \sqrt{\frac{(1.01-1)^2+(0.97-1)^2+(1.03-1)^2+(1.04-1)^2+(0.99-1)^2+(0.98-1)^2+(0.99-1)^2+(1.01-1)^2+(1.03-1)^2}{8}} = 0.0657$

Confidence interval:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 9 - 1 = 8

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 8 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 3.355

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 3.355\frac{0.0657}{\sqrt{9}} = 0.07$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 1 - 0.07 = 0.93

The upper end of the interval is the sample mean added to M. So it is 1 + 0.07 = 1.07

The 99% confidence interval for the mean diameter of pieces from this machine is between 0.93 and 1.07.

7 0

3 years ago

If using the method of completing the square to solve the quadratic equation

Pepsi [2]

Answer:

$\frac{289}{4}$

Step-by-step explanation:

$(\frac{-b}{2a})^{2} = (\frac{-17}{2}) ^2 = \frac{289}{4}$

6 0

3 years ago