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nikitadnepr [17]
4 years ago
8

"Cyber Monday is a huge online shopping day. In 2017, approximately 21% of Cyber Monday shoppers used their mobile device to mak

e a purchase. If a person used a mobile device to make a purchase, the probability of making a purchase from Amazon was .55. Suppose a Cyber Monday purchase is selected at random. What is the probability that the purchase was made with a mobile device and was from Amazon."
Mathematics
1 answer:
Svetlanka [38]4 years ago
5 0

Answer:

11.55% probability that the purchase was made with a mobile device and was from Amazon.

Step-by-step explanation:

We have these following probabilities:

21% probability that a Cyber Monday shopper used their mobile device to make a purchase.

55% probability that a purchase made with a mobile device is from Amazon.

What is the probability that the purchase was made with a mobile device and was from Amazon."

55% of 21%

So

P = 0.21*0.55 = 0.1155

11.55% probability that the purchase was made with a mobile device and was from Amazon.

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What is each number in scientific notation?
Vladimir [108]

0.00037 = 3.7×10^-4

37,000 = 3.7×10^4

_____

The exponent of 10 is the place-value multiplier that the most-significant digit has.

In the first number, the most-significant digit (3) is multiplied by 0.0001 to find its place value. Of course 0.0001 = 10^-4.

In the second number, the most significant digit (3) is multiplied by 10,000 to find its place value. You know that 10,000 = 10^4.

8 0
3 years ago
The volume of a box is given by the expression
Kamila [148]

Answer:

Area = x^2+4x+3

Step-by-step explanation:

The volume of a box is given by the expression

x^3 + 3x^2 - x-3. The height of the box is given by the expression x-1.

volume of the box = Length * width * height

L is the side length of the box;

Given

V(x) = x^3 + 3x^2 - x-3

Factorize

V(x) = x^2(x+3)-1(x+3)

V(x) = (x^2-1)(x+3)

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V = LWH

V = Area * Width

Since the height of the box is x - 1

Area = (x+1)(x+3)

Expand

Area = x^2+3x+x+3

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3 0
3 years ago
The natural resources of an island limit the growth of the population. The population of the island is given by the logistic equ
maksim [4K]

Answer:

The correct option is (a) 3759.

Step-by-step explanation:

The complete question is:

The natural resources of an island limit the growth of the population. The population of the island is given by the logistic equation P(t)=\frac{3759}{1+3.94e^{-0.38t}}where t is the number of years after 1980. What is the limiting value of the population?

(a) 3759

(b) 23

(c) 761

(d) 1017

Solution:

The limiting value is the value of the function P (t) for <em>t</em> → ∞.

As <em>t</em> → ∞, the expression (3.94e^{-0.38t}) → 0.

Thus, making the denominator of P (t) 1.

So, the limiting value of the population is, 3759.

Thus, the correct option is (a) 3759.

5 0
4 years ago
Determine the value of x.
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The answer to this question is B) 44.78

7 0
3 years ago
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Which comparison is true ?<br><br> 3/4 &gt; 7/8<br> 1/2 &lt; 5/8<br> 2/3 &lt; 3/8<br> 7/8 &gt; 9/10
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B

Step-by-step explanation:

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3 years ago
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