Help with this pls and thank u

A freelancer, who specializes in digital marketing, is interested in the average amount of money small businesses spend on pay p

Lapatulllka [165]

Answer:

The freelancer needs to calculate the value of the observed test statistic - average annual pay per click advertising cost - in order to compare with the critical value.

Step-by-step explanation:

His hypothesis test will be:

Null hypothesis: Average Annual Pay per click advertising cost is still less than 3300 dollars

(Note: the null hypothesis is the fact that the experimenter wishes to refute)

Alternative Hypothesis: Average annual pay per click advertising cost is now above 3300 dollars

(Alternative hypothesis is the fact that the experimenter expects to be true)

The Critical Value is a cutoff value for which if the value of the observed test statistic exceeds it, the null hypothesis is refuted and if the value of the observed test statistic is below it, the null hypothesis remains.

That is, either the freelancer accepts that the cost has not risen or he accepts that the cost has risen.

7 0

3 years ago

Which of the following graphs shows the Blue line rotated 90 degrees CW around (0,2) then reflected over the x-axis?

Diano4ka-milaya [45]

Sorry, I need to see the graph options.

4 0

4 years ago

A Cepheid variable star is a star whose brightness alternately increases and decreases. Suppose that Cephei Joe is a star for wh

4vir4ik [10]

Answer:

$\dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi t}{5.3})$

0.16

Step-by-step explanation:

According to the question the mathematical model should be

$B(t)=2.9+0.35\sin(\dfrac{2\pi t}{5.3})$

Differentiating with respect to time we get

$B'(t)=0.35\cos(\dfrac{2\pi t}{5.3})\times(\dfrac{2\pi}{5.3})\\\Rightarrow B'(t)=\dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi t}{5.3})$

So, the rate of change of brightness after t days is $\dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi t}{5.3})$

After 1 day means $t=1$

$B'(1)=\dfrac{0.7\pi}{5.3}\cos(\dfrac{2\pi\times 1}{5.3})\\\Rightarrow B'(1)=0.16$

The rate of increase after one day is 0.16.

8 0

3 years ago

How long can a sea otter stay under water

ss7ja [257]

Answer

More than 5 minutes but no longer than 8.

Step-by-step explanation:

Sea otters have been known to stay submerged for more than 5 minutes at a time. River otters, however, can hold their breath for up to 8 minutes. The increased time underwater improves otters' opportunity to sense prey and forage for food.

8 0

4 years ago

Read 2 more answers

Quadrilateral ABCD is inscribed in a circle. Find the measure of each of the angles of the quadrilateral. Show your work.

Sveta_85 [38]

Your statement that angle C and angle D adding to 180 degrees isn't always true. What is always true is that angle A and angle C add to 180 degrees.

Rule: The opposite angles of an inscribed quadrilateral are supplementary (add to 180 degrees)

So,
(angle A) + (angle C) = 180
(x+2) + (x-2) = 180
x+2+x-2 = 180
2x = 180
2x/2 = 180/2
x = 90

Once you know x, you can find the angles
measure of angle A = x+2
measure of angle A = 90+2
measure of angle A = 92 degrees

measure of angle C = x-2
measure of angle C = 90-2
measure of angle C = 88 degrees

Note how A+C = 92+88 = 180

measure of angle D = x-10
measure of angle D = 90-10
measure of angle D = 80 degrees

measure of angle B = 360-A-C-D ... see note below
measure of angle B = 360-92-88-80
measure of angle B = 100 degrees

Note: for any quadrilateral, the four angles add to 360 degrees. So A+B+C+D = 360. We can solve for B to get B = 360-A-C-D

3 0

3 years ago