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koban [17]
2 years ago
5

Laura wants to develop a model that shows how natural processes can suddenly change the Earths surface. which of the following c

ould she show in the model?
A. Erosion of a sandy beach by storms

B. formation of a canyon by a river

C. craving of a valley by a glacier

D. weathering of rocks by wind

PLZ! help
Mathematics
1 answer:
Masteriza [31]2 years ago
8 0
I really strongly think it’s A
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Please help me with this
vodka [1.7K]

Answer:

\frac{1}{2}  \times  (7.5 + 2.5) \times 2.5 = 12.5

..........................................................the answer is 12.5

7 0
2 years ago
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Round to the nearest ten thousandth.<br>I dont get this
ale4655 [162]
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4 0
2 years ago
The perimeter of a rectangle is 222 millimeters.If the length is 60 millimeters,what is the width of the rectangle?
andrezito [222]
Half of perimeter (or length+ width) is:
222 mm /2= 111 mm.

111 mm- 60 mm= 51 mm

The width of the rectangle is 51 mm~
4 0
2 years ago
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Researchers interviewed street prostitutes in Canada and the United States. The mean age of the 100 Canadian prostitutes upon en
levacccp [35]

Answer:

Step-by-step explanation:

The null and the alternative hypothesis is:

H_o: \mu_c \ge \mu_{us}

H_a : \mu_c < \mu_{us}

The t- student test statistics can be computed as:

t = \dfrac{x_c- x_{us}}{\sqrt{\dfrac{\sigma_c^2}{n_c} + \dfrac{\sigma_{us}^2}{n_{us}} }}

t = \dfrac{19- 21}{\sqrt{\dfrac{7^2}{100} + \dfrac{8^2}{130} }}

t = -2.017  

degree of freedom = (n₁ - 1) + (n₂ - 1)  

= (100 - 1) + (130 - 1)

= 228

Using the data of t-value and degree of freedom;  

The P-value = -0.224

Decision rule: Do not reject the null hypothesis if the p-value is greater than ∝(0.01)

Conclusion: We reject the null hypothesis since the p-value is less than ∝.

Therefore, there is enough evidence to conclude that the mean age of entering prostitution in Canada is lower than that of the United States.

5 0
3 years ago
What is the value of x when x+7=21
Semmy [17]

Answer:

14

Step-by-step explanation:

14 + 7 = 21

4 0
3 years ago
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