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daser333 [38]
4 years ago
11

The air temperature drops from 94°F to 72°F in 15 minutes what is the change in temperature

Mathematics
1 answer:
mamaluj [8]4 years ago
7 0
The temperature drops 22<span>°F in 15 minutes.

22</span>°F / 15 = 1.46<span>°F per minute

Hope I helped!</span>
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Find the area of a circle circumscribing an equilateral triangle of side 15cm.<br> Take pi = 3.14.
miskamm [114]

Answer:

236 cm²

Step-by-step explanation:

Height of an equilateral triangle (h) = √3 /2 (l)

l = side of the equilateral triangle.

h = √3 /2 (15)

In an equilateral triangle the orthocenter, centroid, circumcenter and incenter are in the same spot

The center of the circle is the centroid and height match  with the median. The radius of the circumcircle is equal to two thirds the height.

Formula for the Radius of the circumcircle = 2/3 h

= 2/3 x √3 /2 (15)

= 5 √3 cm     (=radius)

Area of the circle = πr^

= 3.14 x( 5 √3 ) ^

=3.14 x(25*3)

=3.14 x 75

=235.5

=236 cm²

8 0
3 years ago
Y=2x+3<br> solve for y<br> help me plz
ruslelena [56]

Answer:

this is already solved.

Step-by-step explanation:

the only thing left would be graphing it.

5 0
3 years ago
HELP:<br><br> pls help now.....
Maurinko [17]

Answer:

C

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
In
aleksandr82 [10.1K]

Step-by-step explanation:

Let A be the set of people who speak English.    

B be the set of people who speak French.  

A - B be the set of people who speak English and not French.  

B - A be the set of people who speak French and not English.  

A ∩ B be the set of people who speak both French and English.  

Given

n(A) = 72       n(B) = 43       n(A ∪ B) = 100  

Now, n(A ∩ B) = n(A) + n(B) - n(A ∪ B)  

 = 72 + 43 - 100  

= 72 + 43 - 100  

= 115 - 100  

= 15

Therefore, Number of persons who speak both French and English

= 15  

n(A) = n(A - B) + n(A ∩ B)  

⇒ n(A - B) = n(A) - n(A ∩ B)  

= 72 - 15  

= 57

and n(B - A) = n(B) - n(A ∩ B)  

 = 43 - 15 = 28  

Therefore, Number of people speaking English only = 57  

Number of people speaking French only = 28

8 0
3 years ago
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The sum of a number and four times another number is 25
lianna [129]

Answer:

try 5

Step-by-step explanation:

21+4*5=25

4 0
3 years ago
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