Help please! I’ll give brainliest

$102 headphones, 7.5% tax

Vadim26 [7]

Answer: $7.65

Step-by-step explanation:

Divide the cost of what you are buying by 100 then multiply by the tax %

102/100=1.02

1.02*7.5=7.65

8 0

3 years ago

URGENT❗❗❗❗❗❗Elina is gathering up change she has saved. She has a total of $2.60. All of her change is in either nickles, dimes,

oee [108]

Let the number of nickels be = x

Let the number of dimes be = d

Let the number of quarter be = n

Given is, she has twice as many dimes as quarters

d=2n or n = 0.5d

She has two less quarters than nickles.

n= x-2 or

x= n+2

Total values of coins is = $2.60

$0.05x+0.10d+0.25n=2.60$

Now replace x with (n+2) and d with 2n

$0.05(n+2)+0.10(2n)+0.25n=2.60$

$0.05n+0.10+0.20n+0.25n=2.60$

$0.50n+0.10=2.60$

$0.50n=2.50$

$n=5$

Now x=n+2 ; x=5+2 = 7

d=2n ; d=2(5) = 10

Hence, Elina has 7 nickels, 10 dimes and 5 quarters.

3 0

3 years ago

URGENT

Stolb23 [73]

Answer:

We can use the sine law to find h. First, we determine the angle between the line of sight and h:

180 - 90 - 39 = 51 degrees

The sine law states that the ratio of one triangle's angle to the opposite side's length is the same as another angle to its opposite side's length, so we can solve for h as follows:

h/sin(39) = 500/sin(51)

h = 500*sin(39)/sin(51)

When we round to the nearest whole number, we get h = 405 ft.

7 0

2 years ago

Your friend is about to begin an introductory chemistry course at his university. The course has collected data from students on

Minchanka [31]

Answer:

<em>The percentage of students sudy 34 hours or more is 0.62%</em>

Step-by-step explanation:

<u>The Normal Distribution</u>

The bell curve or normal distribution is frequently used to model the probability of natural random events. The normal distribution $N(\mu,\sigma)$ is characterized by two parameters:

$\mu$ is the mean value

$\sigma$ is the standard deviation

The study times in hours for the final exam is modeled as a normal distribution N(24,4). We are required to find the percentage of students study 34 hours or more, or P(X>34).

The values for the cumulative probability are given by tables or digital means like Excel where we can get the left-tail or P(X<Xo). To compute the right-tail or P(X>Xo) we use this relation

$P(X>Xo) =1-P(X$

The Excel formula to find the left-tail cumulative probability is called

NORM.DIST(x,mean,standard_dev,cumulative)

To solve the question, we used:

NORM.DIST(34,24,4,TRUE)=0.9938

Thus:

$P(X>34) =1-P(X$

The percentage of students study 34 hours or more is 0.62%

6 0

3 years ago

Paulo has won the lottery. He is offered a series of payments of $10,000 per year for 10 years. What is the present value of the

sergiy2304 [10]

The present value of the payments is $73,600.87.

Present value of a cash flow is the value of the cash flow today. This is determined by adding the discounted cash flows of the cash flows together.

Discounted year 1 cash flow: 10,000 / (1.06) = 9,433.96

Discounted year 2 cash flow: 10,000 / (1.06)^2 = 8,899.96

Discounted year 3 cash flow: 10,000 / (1.06)^3 = 8,296.19

Discounted year 4 cash flow: 10,000 / (1.06)^4 = 7,920.94

Discounted year 5 cash flow: 10,000 / (1.06)^5 = 7,472.58

Discounted year 6 cash flow: 10,000 / (1.06)^6 = 7,049.61

Discounted year 7 cash flow: 10,000 / (1.06)^7 = 6,650.57

Discounted year 8 cash flow: 10,000 / (1.06)^8= 6,274.12

Discounted year 9 cash flow: 10,000 / (1.06)^9 = 5,918.98

Discounted year 10 cash flow: 10,000 / (1.06)^10 = 5,583.95

The sum of the discounted cash flows = $73,600.87

A similar question was solved here: brainly.com/question/9641711?referrer=searchResults

4 0

3 years ago