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3 years ago

Would a scale factor of -2 be considered an expansion or a contraction?

1 answer:

6 0

Scale factors of negative numbers are contractions

scale factors of numbers greater then 1 are expansions
scale factors of numbers greater then 0 but less then 1 are contractions

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2. It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm

4vir4ik [10]

Answer:

It's required $7.48\ m^2$ of sheet for the tank

Step-by-step explanation:

<u>Surface Area of a Cylinder</u>

Given a right cylinder of base radius r and height h, the surface area is calculated as follows:

$S=2\pi r^2+2\pi r h$

The cylindrical tank has a height of h=1 m and a base diameter of 140 cm. The radius is half the diameter, thus r=140/2 = 70 cm = 0.7 m. Substituting:

$S=2\pi 0.7^2+2\pi (0.7)(1)$

$S=2\pi 0.49+1.4\pi$

$S=2.38\pi$

$\boxed{S=7.48\ m^2}$

It's required $7.48\ m^2$ of sheet for the tank

7 0

3 years ago

HELP PLZ ASAP WORTH XTRA POINTS!! INCLUDES SCREENSHOT

Rainbow [258]

Answer:

Step-by-step explanation:

8x-13+7x-17=180( because stright angle = 180 degree)

15x-30=180

15x=210

x=14

8(14)-13= 99

4 0

3 years ago

The number of typing errors made by a typist has a Poisson distribution with an average of two errors per page. If more than two

wlad13 [49]

Answer: 0.6767

Step-by-step explanation:

Given : Mean = $\lambda=2$ errors per page

Let X be the number of errors in a particular page.

The formula to calculate the Poisson distribution is given by :_

$P(X=x)=\dfrac{e^{-\lambda}\lambda^x}{x!}$

Now, the probability that a randomly selected page does not need to be retyped is given by :-

$P(X\leq2)=P(0)+P(1)+P(2)\\\\=(\dfrac{e^{-2}2^0}{0!}+\dfrac{e^{-2}2^1}{1!}+\dfrac{e^{-2}2^2}{2!})\\\\=0.135335283237+0.270670566473+0.270670566473\\\\=0.676676416183\approx0.6767$

Hence, the required probability :- 0.6767

6 0

3 years ago

Please give me the the answer of the question in the link that's 50 points

svetoff [14.1K]

Answer:

B. y=−5x+1152

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

The sum of two consecutive even integers is 106. What are the integers?

Kruka [31]

Answer:

The integers are 52 and 54

Step-by-step explanation:

x = first even integer

x + 2 = next integer that is even

x + x + 2 = 106

2x + 2 = 106

2x = 104

x = 52

x + 2 = 54

4 0

1 year ago