A= 5,000 (1+.002*10)

recall that the difference between a country's exports and imports is called the country's trade balance. suppose last year the

vovangra [49]

Let's call trade balance b, exports e and imports i.

We now construct formula.

$b=\Delta{ei}=e-i$

Put in the data from last year.

$b=968-1658=\boxed{-690}$

U.S trade balance for that year is -690 billion dollars.

7 0

2 years ago

The length of a rectangle is 2 times the width of the rectangle. Let x represent the width of the rectangle.

nikitadnepr [17]

Answer:

ok ASAP done ..... for it

4 0

2 years ago

To find proportion of the area under the normal curve between two Z scores that are both above the mean, it is necessary to exam

VikaD [51]

It is necessary to imagine the sum of the areas between each z-score and the average.

Given as the ratio of the area under the normal curve between two z-scores, both above average.

The Z score accurately measures the number of standard deviations above or below the mean of the data points.

The formula for calculating the z-score is

z = (data points – mean) / (standard deviation).

It is also expressed as z = (x-μ) / σ.

A positive z-score indicates that the data points are above average.
A negative z-score indicates that the data points are below average.
A z-score close to 0 means that the data points are close to average.
The normal curve is symmetric with respect to the mean and needs to be investigated.

Therefore, to find the percentage of the area under the normal curve between two z-scores, both above the mean, you need to look at the sum of the areas between the z-score and the mean.

Learn more about z-score from here brainly.com/question/16768891

#SPJ4

7 0

1 year ago

An item costs $300 before tax, and the sales tax is $9.90 . Find the sales tax rate. Write your answer as a percentage.

Step2247 [10]

Answer:

3.33%

Step-by-step explanation:

9.90/300=0.033

8 0

2 years ago

Records for the past several years show that 46% of customers at a local game shop use a customer loyalty card. Due to a recent

Ratling [72]

Answer:

1. Null hypotheses: p=0.49

Alternative hypotheses: p>0.49

2. p=0.5704 or 57.04%

Step-by-step explanation:

1.

We have to writer the hypotheses for testing the proportion has increased from 49%. So, the population proportion that is to be tested is 0.49.

As we already know that the null hypotheses always contain equality so,

Null hypotheses: p=0.49

and we have to test whether the proportion has increased from 0.49, so,

Alternative hypotheses: p>0.49

Thus, the hypotheses for testing the proportion has increased from 49% are

Null hypotheses: p=0.49

Alternative hypotheses: p>0.49

2.

We have to find the proportion of sampled customers using loyalty card.

The given sample indicate that 77 out of 135 customers are using loyalty card. So,

p=x/n

where x is the number of favorable outcome and n is total number of outcome.

Here, x=77 and n=135. So,

p=77/135=0.5704 or 57.04%

6 0

2 years ago