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4 years ago

Marco said he can find 350 - 10 by taking the 0 off of 350 to get 35.

Mathematics

1 answer:

kogti [31]4 years ago

8 0

Answer:

Step-by-step explanation:

When Marco is dividing 350 by 10 he takes the 0 off 350 to get 35.

This is a correct step because in decimal system place value of II digit from the right is 10.

Hence 350 has 35 as value 35 multiplied by 10. So when we divide by 10 we get 35 as answer.

But in decimal, 63.70, after points place values would be in negative powers of 10, i.e. 7 after point will have place value as 7/10 and next digit will have 7/10^2 and so on.

So in digits after decimal point we have place values in negative powers of 10 and as a result we cannot cancel 10 and write 63.7

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The total cost for a production process is equal to $1,000 plus two times the number of units produced. The mean and variance fo

Andrej [43]

Answer:

$\mu_p=2000\\\\\sigma_p^2=3600$

Step-by-step explanation:

Let X be the number of units produced, and P be the cost of production.

#Given that $\mu_x=500, \sigma_x^2=900$

Cost of production can be calculated as:

$P=1000+2X$

#Mean of the total cost is calculated as;

$\mu_p=1000+2\mu_x\\\\=1000+2(500)\\\\=2000$

Hence, the mean cost of production is $2,000

#Variance of the total cost is calculated as;

$\sigma_p^2=2^2\sigma_x^2\\\\=2^\times 900\\\\=3600$

Hence, the variancecost of production is $3,600

8 0

3 years ago

What is the discriminant of the polynomial?<br>2x^2+5x-8<br>

12345 [234]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

Let's find the discriminant (D) of the given polynomial ~

Let's compare the given quadratic expression with general expression ~

$\boxed{ \boxed{ \sf {ax}^{2} +b x + c }}$

we get ;

$\sf \: a = 2$
$\sf \: b = 5$
$\sf \: c = - 8$

Now, use the following formula :

$\qquad \sf \dashrightarrow \: D = b² - 4ac$

$\qquad \sf \dashrightarrow \: D = (5) {}^{2} - (4 \times 2 \times ( - 8))$

$\qquad \sf \dashrightarrow \: D = 25 - ( - 64)$

$\qquad \sf \dashrightarrow \: D = 25 + 64$

$\qquad \sf \dashrightarrow \: D = 89$

Therefore, discriminant of the given quadratic expression is 89

5 0

3 years ago

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Sveta_85 [38]

Answer:

Step-by-step explanation:

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3 years ago

What does that symbolize?

abruzzese [7]

Answer:

I don't know if im right but t

o clarify, the m is sometimes used to distinguish between the measure of the angle (m∠ABC = a number, in degrees/radians) and the actual angle itself (the geometric object ∠ABC).

Step-by-step explanation:

4 0

3 years ago

A normal distribution is symmetric; therefore the probability of being below the mean is 0.50 and the probability of being above

ladessa [460]

Answer:

a. True

Step-by-step explanation:

We have been given a statement. We are asked to determine whether the given statement is true or false.

Statement: A normal distribution is symmetric; therefore the probability of being below the mean is 0.50 and the probability of being above the mean is 0.50.

We know that normal distribution is continuous probability distribution.

We know that the total area under a normal distribution curve is equal to 1. We also know that mean represents center of the normal distribution curve.

The half area will be below center and half area will be above center.

Since 0.50 is half of 1, therefore, the probability of being below the mean is 0.50 and the probability of being above the mean is 0.50 and given statement is true.

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4 years ago