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2 years ago

Zoe had x dollars on Monday.

Mathematics

2 answers:

mel-nik [20]2 years ago

6 0

13.00 I think I don’t know if that correct but that’s what I got

lakkis [162]2 years ago

6 0

It’s $25.55 as if she took 4.50 from 20 it makes 15.50 and half of that it’s 7.75 plus $17.80 is $25.50

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Find the area under the standard normal curve to the right of z=1.9

tresset_1 [31]

To find the area to the right of a positive z-score, begin by reading off the area in the standard normal distribution table. Since the total area under the bell curve is 1, we subtract the area from the table from 1. For example, the area to the left of z = 1.02 is given in the table as .846.

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2 years ago

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:

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

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2 years ago

A plane is flying at 1000 meters above the ground and fires a laser 60 degrees of of straight down. what is the distance the lig

juin [17]

Answer:

Step-by-step explanation:

The distance the light traveled to the ground is the range of the plane expressed as:

R = U*√2H/g

U is he velocity

H is the max height

g is the acc. due to gravity

Let us get U first using the formula

H = u²sin²Ф/2g

1000 = u²sin²60/2(9.81)

1000*19.62 = 0.8660u²

19620 = 0.8660u²

u² = 19620/0.8660

u² = 22655.88

u = √22655.88

u = 150.52m/s

Next is to get the range

R = 150.52√2(1000)/9.81

R = 150.52 √2000/9.81

R = 150.52√203.87

R = 150.52*14.28

R = 2149.16m

Hence the distance the light traveled to the ground is 2,149.16m

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2 years ago

Simplify: –3(y + 2)2 – 5 + 6y What is the simplified product in standard form?

Lina20 [59]

-3(y+2)^2-5+6y
-3(y^2+4y+4)-5+6y
-3y^2-12y-12-5+6y
-3y^2-6y-17

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2 years ago

The revenue each season from tickets at the theme part is represented by t(x) = 5x. The cost to pay the employees each season is

Over [174]

Answer: D. 15

Step-by-step explanation:

Given : The revenue each season from tickets at the theme part is represented by $t(x) = 5x$ .

The cost to pay the employees each season is represented by $r(x) = (1.5)x$ .

From the given graph , we can see that at 4th season, the profit = 15

Hence, the estimated profit after four seasons. =15

8 0

2 years ago