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3 years ago

12

Your email marketing service shuts you down if your spam reports exceed 2%. You are doing a mailing to 800 people. What is the m

aximum number of spam reports you can get without being shut down?
a) 2
b) 16
c) 80
d) 800

2 answers:

Studentka2010 [4]3 years ago

4 0

the answer for this question is b) sixteen 16

Dmitry [639]3 years ago

4 0

Answer:

b) 16.

Step-by-step explanation:

It has been given that your email marketing service shuts you down if your spam reports exceed 2%. You are doing a mailing to 800 people.

To find the maximum number of spam reports you can get without being shut down we will find 2% of 800.

$\text{Maximum number of spam reports you will get without being shut down}=\frac{2}{100}\cdot 800$

$\text{Maximum number of spam reports you will get without being shut down}=2\cdot 8=16$

Therefore, the maximum number of spam reports you can get without being shut down is 16 and option b is the correct choice.

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Some nations require their students to pass an exam before earning their primary school degrees or diplomas. A certain nation gi

VladimirAG [237]

Answer:

0.119 is the probability that their scores differ by more than 15 points.

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 41

Standard Deviation, σ = 9

We are given that the distribution of score is a bell shaped distribution that is a normal distribution.

D is a random variable and defined as the difference between their scores.

$D = X-Y\\\mu_D = E(X)-E(Y) = 41-41 = 0\\ \sigma_D = \sqrt{\sigma_x^2 + \sigma_y^2 } = \sqrt{9^2 + 9^2} = 9\sqrt{2}$

D follows a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(scores differ by more than 15 points)

$P(d > 15) = P(z > \displaystyle\frac{15-0}{9\sqrt{2}}) = P(z > 1.1785)\\\\P( z > 1.1785) = 1 - P(z \leq 1.1785)$

Calculating the value from the standard normal table we have,

$1 - 0.881 = 0.119 = 11.9\%\\P( d > 15) = 11.9\%$

0.119 is the probability that their scores differ by more than 15 points.

3 0

3 years ago

Which ordered pair is a solution to the system of equations 4x-y=10 y=2x-2

slava [35]

Answer:

single solution : (4 ; 6)

Step-by-step explanation:

hello :

4x-y=10.....(1)

y=2x-2.....(2)

put the value for y in (1) :

4x-(2x-2)=10

4x-2x +2 = 10

2x=8

x=8/2 =4

but : y = 2x-2

so : y =2(4)-2=6

single solution : (4 ; 6)

6 0

3 years ago

Please help me I'm so bad at math and doing AFDA really doesn't help.. Its quadratic equations matching solution sets.

stiv31 [10]

Answer:

$(a)\ x + 4 = \±\sqrt9$ ---- $x =\{-7,- 1\}$

$(b)\ x - 4 = \±\sqrt9$ ---- $x = \{1,7\}$

$(c)\ x + 3 = \±\sqrt{16}$ ----- $x = \{-7,1\}$

$(d)\ x - 3 = \±\sqrt{16}$ ---- $x = \{-1,7\}$

Step-by-step explanation:

Given

The attached equations

Required

Match each with the solution

$(a)\ x + 4 = \±\sqrt9$

Take the square root of 9

$x + 4 = \±3$

Solve for x

$x =- 4 \±3$

Split

$x =\{- 4 -3,- 4 +3\}$

$x =\{-7,- 1\}$

$(b)\ x - 4 = \±\sqrt9$

Take the square root of 9

$x - 4 = \±3$

Solve for x

$x = 4 \±3$

Split

$x = \{4 -3,4+3\}$

$x = \{1,7\}$

$(c)\ x + 3 = \±\sqrt{16}$

Take the square root of 16

$x + 3 = \±4$

Solve for x

$x =- 3 \±4$

Split

$x = \{-3-4,-3+4\}$

$x = \{-7,1\}$

$(d)\ x - 3 = \±\sqrt{16}$

Take the square root of 16

$x - 3 = \±4$

Solve for x

$x =3 \±4$

Split

$x = \{3-4,3+4\}$

$x = \{-1,7\}$

6 0

3 years ago

Let x represent an unknown number. Write an equation that represents the given statement. Then find the value of the unknown num

LenaWriter [7]

Hey there! I'm happy to help!

If something is 11 less, we are subtracting 11.

-11

We have 11 less than seven times a number x.

7x-11

The word is means equals.

7x-11=-4

Now we need to isolate the x. We add 11 to both sides.

7x=7

We divide both sides by 7.

x=1.

Have a wonderful day! :D

7 0

3 years ago

What is the perimeter of the triangle?

yulyashka [42]

i am edditing my post because i got the answer wrong

6 0

2 years ago