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Artist 52 [7]
2 years ago
10

Assume that the readings at freezing on a bundle of thermometers are normally distributed with a mean of 0°C and a standard devi

ation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading greater than -0.084°C.
P(Z>-0.084)
Mathematics
1 answer:
kolezko [41]2 years ago
8 0

Answer:

0.53347

Step-by-step explanation:

We solve the above question using z score formula

z = (x-μ)/σ, where

x is the raw score = -0.084 °C

μ is the population mean = 0 °C

σ is the population standard deviation = 1°C

Z score =x - μ/σ

= -0.084 - 0/1

= -0.084

Probability value from Z-Table:

P(x<-0.084) = 0.46653

P(x>-0.084) = 1 - P(x<-0.084) = 0.53347

The probability of obtaining a reading greater than -0.084°C = P(x > -0.084) =

is 0.53347

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Martin would like to start training to run a marathon. The first week he runs a total of 15 miles. He would like to run 0.3 more
anygoal [31]

Answer: 15.3 miles

Step-by-step explanation:

From the question, we are informed that Martin would like to start training to run a marathon and that first week he runs a total of 15 miles.

We are further told that he would like to run 0.3 more miles each week than the week before. There, the number of miles that Martin will run the second week will be:

= 15 miles + 0.3 miles

= 15.3 miles

3 0
3 years ago
If the farmer has 250 feet of fencing to create a rectangular pen, define a function f that expresses the area of the field (mea
hoa [83]

Answer:

Maximum area possible

f(max)  = 3906,25 ft²

Dimensions:

a  = 62,5  ft

w  = 62,5 ft

Step-by-step explanation:

Perimeter of the rectangular fencing    P  =  250 feet

And sides of the rectangle  a  and  w (width of rectangle)

Then

A =  a*w

2a  + 2w  = 250       ⇒  a  =  (250 -2w)/ 2    ⇒  a = 125 - w

f(w)  =  (125  - w ) *w        f(w)  = 125w - w²  

Taking derivatives both sides of the equation

f´(w)   =  125  - 2w              f´(w)   = 0           125  - 2w = 0

w = 125/2

w = 62,5 ft            ⇒  a = 125 - 62,5

a = 62,5 ft

f(max)  = ( 62,5)²

f(max)  = 3906,25 ft²

8 0
3 years ago
A transformation of ΔDEF results in ΔD'E'F'.
Leya [2.2K]
<h3>Answer:</h3>

The transformation is a rotation.

<h3>Step-by-step explanation:</h3>

The incorrect answers can be ruled out as follows:

  • dilation would change the size, but not the directions of the lines
  • reflection would change the DEF ordering from clockwise to counterclockwise
  • translation would move the figure, but not change the directions of the lines

The image is the same size as the original. Each of the sides of the triangle is moved through the same angle. The transformation is a rotataion.

The center of rotation can be found as the point of intersection of the perpendicular bisectors of DD', EE' and FF'

5 0
3 years ago
Read 2 more answers
The value of r represents the distance from a point to the pole when plotting that point in polar coordinates. True or False?
AURORKA [14]

Answer:

True, r represents the distance from a point to the pole when plotting that point in polar coordinates.

Step-by-step explanation:

Given: The statement '' The value of r represents the distance from a point to the pole when plotting that point in polar coordinates ''

To state: whether the given statement is true or false

Solution:

In the cartesian coordinate system, any point is represented by the coordinates  (x,y)

In polar-coordinates system, distance of the point from the origin (pole)(r) and the angle (\theta) that the line joining the point to the origin makes with the positive  x -axis are used as polar coordinates. Polar coordinates are of form (r,\theta)

True, r represents the distance from a point to the pole when plotting that point in polar coordinates.

7 0
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Bingel [31]

Answer:

Your answer is D.

Step-by-step explanation:

Although A and C are also correct, according to a graph using the free online program Desmos

6 0
3 years ago
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