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sveticcg [70]
3 years ago
5

The following are the temperatures of 10 days in winter in °C. -5, 1, -2, 7, -3, 9, 7, -5, -2, -5 Work out the mean temperature.

Mathematics
2 answers:
Citrus2011 [14]3 years ago
5 0

Answer:

probably 0.2 and sorry if wrong

mojhsa [17]3 years ago
5 0
0.2 because

mean = adding all numbers together then divide by the amount of numbers there is
so -5 + 1 + -2 +7+-3+9+7+-5+-2+-5 = 2 then divide by 10 (cause 10 numbers)
answer = 0.2
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a street light is at the top of a 18 ft tall pole. a woman 6 ft tall walks away from the pole with a speed of 4 ft/sec along a s
shutvik [7]

The most appropriate choice for similarity of triangles will be given by -

Speed of tip of the shadow of woman  = 6 ft/s

What are similar triangles?

Two triangles are said to be similar, if the corrosponding angles of the triangles are same and the corrosponding sides of the triangles are in the same ratio.

Here,

The diagram has been attached here

Let the distance of woman from the pole be x ft and the distance of tip of the shadow to the pole be y ft.

Height of street light = 18 ft

Height of woman = 6ft

The two triangles are similar [As height of woman is parallel to the height of pole]

\frac{y - x}{6}=\frac{y}{18}\\18y - 18x = 6y\\18y - 6y = 18x\\12y = 18x\\y = \frac{18}{12}x\\y = \frac{3}{2}x\\

To find the speed, we have to differentiate both sides with respect to time 't'

\frac{dy}{dt} =\frac{3}{2}\frac{dx}{dt}\\\frac{dy}{dt}=\frac{3}{2} \times 4\\\frac{dy}{dt} = 6

Speed of tip of her shadow = 6 ft

To learn more about similarity of triangles, refer to the link-

brainly.com/question/14285697

#SPJ4

6 0
1 year ago
Amina was asked to write the prime factorization of 525
ioda

Answer:

Prime factorization of 525 is 3×5×5×7

6 0
3 years ago
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Shelby will take a total of 6 tests. On the first 5 tests, her scores were: 80, 85, 73, 78, 90. If she wants a mean grade of 80,
Andrew [12]

Answer:

74

Step-by-step explanation:

4 0
3 years ago
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