Ask question

Ask question

All categories

3 years ago

6

The table shows the relationship between the number of days an ice cream shop is open

1 answer:

Igoryamba3 years ago

3 0

The first graph is a perfect graph for this representation, from he graph we can conclude that sales were following exponential function. This can be seen by drawing a smooth trend line cutting the plotted points. Hence, this implies that the future sales can be estimated using exponential functions.

You might be interested in

Suppose that the mean water hardness of lakes in Kansas is 425 mg/L and these values tend to follow a normal distribution. A lim

tino4ka555 [31]

Answer:

The mean water hardness of lakes in Kansas is 425 mg/L or greater.

Step-by-step explanation:

We are given the following data set:

346, 496, 352, 378, 315, 420, 485, 446, 479, 422, 494, 289, 436, 516, 615, 491, 360, 385, 500, 558, 381, 303, 434, 562, 496

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{10959}{25} =438.36$

Sum of squares of differences = 175413.76

$S.D = \sqrt{\dfrac{175413.76}{24}} = 85.49$

Population mean, μ = 425 mg/L

Sample mean, $\bar{x}$ = 438.36

Sample size, n = 25

Alpha, α = 0.05

Sample standard deviation, s = 85.49

First, we design the null and the alternate hypothesis

$H_{0}: \mu \geq 425\text{ mg per Litre}\\H_A: \mu < 425\text{ mg per Litre}$

We use one-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{438.36 - 425}{\frac{85.49}{\sqrt{25}} } = 0.7813$

Now, $t_{critical} \text{ at 0.05 level of significance, 24 degree of freedom } = -1.7108$

Since,

The calculated t-statistic is greater than the critical value, we fail to reject the null hypothesis and accept it.

Thus, the mean water hardness of lakes in Kansas is 425 mg/L or greater.

6 0

3 years ago

Please Help, it’s needed.

viva [34]

Answer:

A: She earns 10 dollers per houer

B: x*2=y

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Witch of the following are equivalent to 45%? choose all that apply.

olga55 [171]

B) 0.45 and D) 9/20 are both eqivalent to 45%.

8 0

3 years ago

Read 2 more answers

If x=-2 solve 4x^3-6x^2+x-1

Bumek [7]

Answer:

-59

Step-by-step explanation:

x = -2

4(-2)³ - 6(-2)² + (-2) - 1

= -32 - 24 - 2 - 1

= - 59

8 0

2 years ago

Read 2 more answers

Need help ASAP please and thank you

slamgirl [31]

Answer:

X=4

Step-by-step explanation:

The angle CA equals 4. The angle AB are equal to the angle CA therfore, the outcome of x=4.

3 0

3 years ago