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3 years ago

What is the speed of sound near earths surface at 15 C and at 2 C in simplistic form?

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

3 0

What the hell how you learning this in middle school but i learned it was about 1048 km/h

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What is the answer to the pic

MA_775_DIABLO [31]

Answer:

$7$

Step-by-step explanation:

$\frac{7^{-1}}{7^{-2}}$

$7^{-1-(-2)}$

$7^{-1+2}$

$7^{1}$

$7$

I used the following rules:

$\frac{a^m}{a^n}=a^{m-n}$

$a^1=a$

$a \neq 0$

6 0

3 years ago

Find the value of X.

Kobotan [32]

Answer:

x = 18.46

Step-by-step explanation:

Find the last angle of the triangle.

180-90-72 = 18

The cosine of an angle is equal to the ratio of the adjacent side to the hypotenuse.

cos(b) = adj/hyp

CosB=a/c rewrite to get

6/CosB (72) = 19.41

Find the last side of the triangle using the Pythagorean theorem.

b=square root c^2 - a^2

b=square root 376.99 - 36

b= 18.46

3 0

3 years ago

In a certain region, the equation y=19.485x+86.912 models the amount of a homeowner’s water bill, in dollars, where x is the n

DanielleElmas [232]

Answer:

It's choice 2.

Step-by-step explanation:

y=19.485x+86.912

The 19.485 is the slope of the graph of this equation. This gives the rate of change of the amount of the bill (above $86.912) for each added resident (x).

5 0

3 years ago

To save money, a local charity organization wants to target its mailing requests for donations to individuals who are most suppo

Naya [18.7K]

Answer:

$(0.55525, 1.24475)$

Step-by-step explanation:

Given that to save money, a local charity organization wants to target its mailing requests for donations to individuals who are most supportive of its cause.

Men women

Sample size 5 5

Mean rate 6.2 5.3

Mean diffference = $6.2-5.3=0.9$