MATHEMATICS HIGH SCHOOL

9.45 x 10^-5 In standard form

Answers

Answer 1
Answer: The answer is : 0.0000945
Hope this helped have a good day!

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You are an urban planner assessing the growth of a city. Ten years ago, the city's population was 249,583. Its current population is 318,270. By about what percentage has the city grown over the past ten years? Can anyone explain this one?
What is the value of the expression?Drag and drop the answer into the box to match the expression.3.75+(−2.16)3.75+(−2.16)​−6.09−6.09​​−5.91−5.91​−1.59−1.59−0.41−0.410.411.595.916.091 2 3 4 5
which of the following can be trend lines on a graph? a. curved lines or strait b. only curved lines c. only strait lines

which of the following is not an example of a graph of a single variable? a. a pie chart b. a bar graph c. a time-series graph

Answers

I think the answer would be a bad graph

Please solve the equation
X^2+3x+3=0

Answers

x² + 3x + 3 = 0

I can tell by looking that there's no easy way to factor the left side,
so we'll have to use the Quadratic formula.

Before doing that, let's just take a look at the discriminant:

( B² - 4AC ) = (9) - (4 x 3 x 1) = (9 - 12) = -3 .
The discriminant is negative, so we know that the roots will be complex conjugates.

Again:  x² + 3x + 3 = 0

x = (1/2) [ -3 plus or minus the square root of (-3) ]

x = -3/2 + (1/2) j√3
and
x = - 3/2 - (1/2) j√3

Brownies are now on sale. Each brownie costs $0.20 less than the original price. Right now, if you buy 8 of them it will cost $15.20

Answers

Answer: The original price of brownie was $2.1 each.

Step-by-step explanation:

since we have given that

Let the original price will be x

Number of brownie purchased = 8

According to question , each brownie costs $0.20 less than the original price.

So, it becomes

8* (x-0.20)=\$15.20\n\n8x-1.6=15.20\n\n8x=15.20+1.60\n\n8x=16.8\n\nx=(16.8)/(8)\n\nx=\$2.1

Hence, the original price of brownie was $2.1 each.

1. In a certain county, the number of Charter Schools is eleven less than twice the number of Alternative Schools. There are 35 Charter Schools in the county. Which of the following equations would you use to find the number of Alternative Schools, a, in the county? 


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The first choice ... 2a - 11 = 35 ... will lead you to the number of
Alternative Schools 'a' in the county.

2/3 of a some of money is 48p. What is 5/8 of the sum of money?

Answers

Let the sum of money be x
so 2/3 of x = 48p
so x = 48*3/2 = 72p
so 5/8 of the sum of money = 5/8*72 = 45p

A researcher collated data on Americans’ leisure time activities. She found the mean number of hours spent watching television each weekday to be 2.7 hours with a standard deviation of 0.4 hours. Jonathan believes that his football team buddies watch less television than the average American. He gathered data from 15 football teammates and found the mean to be 2.3. Which of the following shows the correct z-statistic for this situation?

Answers

Answer:

Z Test = -3.87298

p= .0001

Then the results are significant at p values < 0.1

Step-by-step explanation:

To answer this question we have to consider some things.

1) The Mean of Population is given by this formula:

\mu =(\sum X_(i))/(N)\; \mu=2.8

The Population Standard Deviation is given by this formula:

\sigma =\frac{\sqrt{(x_(i)-\mu)^(2)}}{N}\: \sigma=0.4

On the other hand, the Team buddies are a sample of this population, whose mean is:

\bar{x} = (\sum x_(i) )/(n)=2.3

The Sample Standard Deviation is given by this formula:

\S =\frac{\sqrt{(x_(i)-\mu)^(2)}}{N-1}\: \s=

The Z test shows us the validity of the results.

2)

For the Z test we need the Variance \sigma ^(2)

Z = (M - μ) / √(σ2 / n)

Z_(score)=\frac{2.3-2.7}{\sqrt{(0.16)/(0.15)}}\nZ_(score)= -3.87298

3)

Z Test = -3.87298 standard deviation units, since it's a negative value is 3.897 below the mean.

p= .0001 the p value.

Then the results are significant at p values < 0.1

Answer:

-3.87...just took the test and got this question right
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