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2 years ago

If you DO NOT KNOW then DO NOT ANSWER

Mathematics

2 answers:

Marrrta [24]2 years ago

8 0

The answer is A because i did this and got it correct

madam [21]2 years ago

7 0

Answer:

Answer = a

i know this because my braniac of a brother told me so.He has never gotten an answer wrong

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A website randomly selects among 10 products to discount each day. The color printer of interest to you is discounted today. Det

Varvara68 [4.7K]

Answer:

a) P = 0.039

b) The expected number of days is 10 days.

Step-by-step explanation:

The most appropiate distribution to use in this case is the geometric distribution, in order to calculate the probability of a success after k failure trials.

The probability of success, as each of the 10 products are assumed to have fair probabilities, is:

$p=1/10=0.1$

Then, the probability that our product is not selected any given day is:

$q=1-p=1-0.1=0.9$

a) The probability that exactly this product is selected exactly 10 days from now is the probability that is not selected (probbility q) for the next 9 days and selected (probability p) at the 10th day:

$P=q^9p^1=0.9^9\cdot0.1=0.3874\cdot0.1=0.039$

b) The expected number of days is calculated as:

$E(X)=\dfrac{1}{p}=\dfrac{1}{0.1}=10$

6 0

2 years ago

A gallon of paint covers 400 square feet. How many square feet will 2 3/8 gallons of paint cover?

Black_prince [1.1K]

1 gal = 400 ft²
2 3/8 gal = ? ft²

to solve, use similar ratios with units gal/ft² and compare

(1)/(400) = (2 3/8)/(x)

*multiply both sides by (x) and divide both sides by (1)/(400), you get:

x = (400)*(2 3/8)/(1) = 400*(2 3/8) = 400*2 + 400*3/8 = 800 + 150 = 950 ft²

answer is 950 ft²

8 0

2 years ago

You want to order carpet for an area in your house. The room measures 12 feet by 10 feet. Remember, Area = Length × Width. If ea

pochemuha

Answer:

402.9 $

Step-by-step explanation:

first you must turn foot into yards "every 3 foot = 1 yard"

3.33 , 4

then we will use the area=length x width formula

3.33 x 4 = 13.32 square yards

the cost of the carpet is

13.32 x 30.25 = 402.9$

4 0

2 years ago

The quadratic function y = -10x2 + 160x - 430 models a store's daily profit (y), in dollars, for selling T-shirts priced at x do

alexdok [17]

Answer:

D,B,C,A

Step-by-step explanation:

Look at the picture

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1 year ago

The diagram shows a field. 140 m 66 m 102 m Work out the area of the field.

aalyn [17]

Answer:

7986

Step-by-step explanation:

66x0.5x(140+102)=7986

3 0

2 years ago