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3 years ago

Could someone please help me out

Mathematics

1 answer:

s344n2d4d5 [400]3 years ago

7 0

Answer:

1: 3/1 also just 3

2: 0 also known as the origin

3: y=3x

Step-by-step explanation:

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Could any one say for me the volume and the surface for "Pyramid, Cone and Sphere"

Kazeer [188]

Answer:

Pyramid: In fact, the volume of any pyramid is one-third the area of the base times the height. Finding the surface area of a pyramid is done by first finding the area of the base and the area of each lateral face. … Lastly, the surface area of a pyramid is the sum of the area of the base and the lateral area!

Cone: a volume of 4 3 π r 3 \frac{4}{3} \pi r^3 34πr3 and a surface area of 4 π r 2 4 \pi r^2 4πr2.

Sphere: A cone is essentially a pyramid with a circular base. The volume of a pyramid is given by Vpyramid=Abase⋅h3. Since the area of the base of a cone is πr2, the formula for the volume of a cone is Vcone=πr2h3.

5 0

3 years ago

The tourists went in the first hour with a speed of 3.5km/h to the bus station, realizing that they would arrive 1 hour late at

mestny [16]

The answer should be 4.25km

7 0

3 years ago

4-2 1/4 <br> as a fraction !!!<br> ill mark !!<br> have a good day !!

noname [10]

Answer:

3/4

Step-by-step explanation:

it's for sure 3/4!!!!!

7 0

3 years ago

An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 4.

Leno4ka [110]

Answer:

P(4 non-work-related e-mails)=0.1933

P(7 or more non-work-related e-mails)=0.1442

P(3 or less non-work-related e-mails)=0.3771

Step-by-step explanation:

A Poisson distribution is useful to measure the probability of a number of events in a given period, in this problem, receiving a non-work-related e-mail would be the event and an hour would be the period of time.

Its probability mass function is $f(k; \lambda) = P(x=k) = \frac{\lambda^k e^{-\lambda}}{k!}$ , being k the number of events and λ how many sucesses (events) are per period of time (4.3 in this case)

First, we calculate what is the probability of receiving exactly 4 e-mails:

$f(k; \lambda) =P(k=4) =\frac{4.3^4 e^{-\4.3}}{4!}=0.1933$

As k is a discrete variable, to know the joint probability of different number of events we add the probability of each value.

The probability of receiving 7 or more is the sum of P(7), P(8), ..., P(∞):

$P(k\geq 7 ) =\sum_{i=7}^{\infty}\frac{4.3^i e^{-\4.3}}{i!}=0.1442$

Last, the probability of receiving 3 or less is the sum of P(0), P(1), P(2) and P(3):

$P(k\leq3 ) =\sum_{i=0}^{3}\frac{4.3^i e^{-\4.3}}{i!}=0.3771$

3 0

3 years ago

Choose the best description of the roots of the equation 3x 2 - 4x + 5 = 0.

Naily [24]

For this case we have the following polynomial:
$3x ^ 2 - 4x + 5 = 0
$
Using the resolver we have:
$x = \frac{-b +/- \sqrt{b^2 - 4ac}}{2a}$
Substituting values we have:
$x = \frac{-(-4) +/- \sqrt{(-4)^2 - 4*3*5}}{2*3} 

$
$x = \frac{4 +/- \sqrt{16 - 60}}{6}$
$x = \frac{4 +/- \sqrt{-44}}{6}$
$x = \frac{4 +/- \sqrt{-4*11}}{6}$
$x = \frac{4 +/- 2\sqrt{-11}}{6}$
$x = \frac{2 +/- \sqrt{-11}}{3}$
$x = \frac{2 +/- i\sqrt{11}}{3}$
Answer:
We observe that the solution to the quadratic equation are two imaginary roots.

7 0

3 years ago