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Bingel [31]
2 years ago
13

Will give brainliest!

Mathematics
1 answer:
miv72 [106K]2 years ago
6 0

Answer:

it means that the roots of the quadratic equation is real and distinct and that means that 40 is a positive value

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Why is it necessary to check that n modifyingabove p with caret greater than or equals 5np≥5 and n modifyingabove q with caret g
Nookie1986 [14]

Both of these conditions must be true in order for the assumption that the binomial distribution is approximately normal. In other words, if np \ge 5 and nq \ge 5 then we can use a normal distribution to get a good estimate of the binomial distribution. If either np or nq is smaller than 5, then a normal distribution wouldn't be a good model to use.

side note: q = 1-p is the complement of probability p

4 0
3 years ago
The volume of a right circular cone is 1,780.38 in3. If the height of the cone is 21 in, what is the diameter of the cone? (Use
iragen [17]

Answer:

18

Step-by-step explanation:

volume of cone=πr²*h/3  

21/3=7, 3.14*7=21.98,1780.38/21.98=81,square root of 81=9,9+9+18

3 0
3 years ago
Given that <img src="https://tex.z-dn.net/?f=I_0%20%3D%2010%5E-12" id="TexFormula1" title="I_0 = 10^-12" alt="I_0 = 10^-12" alig
Alex Ar [27]

The intensity of sound which the decibel level of the sound measures 156 is 3.981 × 10³ W/m²

Decibel level, dB = 10log₁₀(I/I₀) where dB = decibel level = 156, I = intensity at 156 dB and I₀ = 10⁻¹² W/m².

Since we require I, making I subject of the formula, we have

dB/10 = log₁₀(I/I₀)

\frac{I}{I_{0} } = 10^{\frac{dB}{10} } \\I = I_{0} 10^{\frac{dB}{10} }

Substituting the values of the variables into the equation, we have

I = I_{0} 10^{\frac{dB}{10} }\\I = 10^{-12} 10^{\frac{156}{10} }\\I = 10^{-12} 10^{15.6}\\I = 10^{15.6-12} \\I = 10^{3.6} W/m^{2}

I = 3981.072W/m²

I = 3.981 × 10³ W/m²

So, the intensity of sound which the decibel level of the sound measures 156 is 3.981 × 10³ W/m²

Learn more about intensity of sound here:

brainly.com/question/4431819

3 0
3 years ago
Geometry help plzzzz
tatyana61 [14]

Answer:

x=12

Step-by-step explanation:

3x-6=30

plus 6 both sides

3x=36

divide 3 both sides

x=12

8 0
3 years ago
70.59 rounded to the nearest whole
SCORPION-xisa [38]
When you i round,decimals more than .50 will round up. So, this is 71 rounded.
3 0
3 years ago
Read 2 more answers
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