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3 years ago

I need the answers for these please

Mathematics

1 answer:

riadik2000 [5.3K]3 years ago

8 0

Answer:
Q.10 = C
Q.12 = C

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Sound City sells the ClearTone-400 satellite car radio. For this radio, historical sales records over the last 100 weeks show 4

Ksivusya [100]

Answer:

See below

Step-by-step explanation:

$\bf \mu(x)$ is the average

$\bf \mu(x)=\frac{4*0+33*1+39*2+12*3+8*4+4*5}{100}=\frac{199}{100}=1.99\;radios/week$

$\bf \sigma^2(x)$ is the variance

$\bf \sigma^2(x)=\frac{4*(0-1.99)^2+33*(1-1.99)^2+39*(2-1.99)^2+12*(3-1.99)^2+8*(4-1.99)^2+4*(5-1.99)^2}{100}=\frac{128.99}{100}=1.2899$

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4 years ago

The cube root of 0.000004913 is

Vlad1618 [11]

Answer:

$\sqrt[3]{0.000004913}=0.017$

Step-by-step explanation:

<u>Cubic Root </u>

The cubic root of a number N is M, if

$M^3=N$

It's usually tedious to manually compute cubic roots, but if we use some basic algebra concepts, the job is easily done.

Let's compute

$M=\sqrt[3]{0.000004913}$

The argument can be expressed in scientific notation as

$0.000004913= 4913\ 10^{-9}$

The power of 10 has an exact cubic root since the exponent is a multiple of 3. To find the cubic root of the mantissa, we note it's the triple product of 17, i.e.

$4913=17*17*17=17^3$

Thus our number is

$M=\sqrt[3]{17^3\ 10^{-9}}=17\ 10^{-3}=0.017$

We have then

$\boxed{\sqrt[3]{0.000004913}=0.017}$

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Answer:

Step-by-step explanation:

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