3 years ago

What is the best estimate

Mathematics

1 answer:

Nutka1998 [239]3 years ago

8 0

The answer is b or 20

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Jonathan bought a calculator for X$. Cindy bought the same calculator for 3 times more than Jonathan paid for his calculator. Wh

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3x or 3*x

Step-by-step explanation:

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3 years ago

How do you get 40y from the difference of 2 squares with the problem (5y+4+3x)(5y+4-3x)? I understand distribution method. I don

otez555 [7]

Answer:

Step-by-step explanation:

(5y+4+3x)(5y+4-3x) = (5y+4)² - (3x)²......(from the difference of 2 squares )

by identity : (a+b)(a-b) = a² - b²

in this exercice ; a = 5y+4 and b = 3x

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3 years ago

Construct and interpret a 95% confidence interval to estimate the proportion of the earth that is water. Show all work. Make sur

blondinia [14]

the answer would be 2

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3 years ago

Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.5 parts

Hunter-Best [27]

Answer:

The value of the test statistic is $t = 2.1$

Step-by-step explanation:

Our test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the expected value, $\sigma$ is the standard deviation and n is the size of the sample.

The level of ozone normally found is 7.5 parts/million (ppm).

This means that $\mu = 7.5$

The mean of 24 samples is 7.8 ppm with a standard deviation of 0.7.

This means that $X = 7.8, \sigma = 0.7, n = 24$

Test Statistic:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{7.8 - 7.5}{\frac{0.7}{\sqrt{24}}}$

$t = 2.1$

The value of the test statistic is $t = 2.1$

7 0

3 years ago

Tao Bergolts bank granted him a single-payment loan of $4,400 at an interest rate of 12 percent. The term of the loan is 172 day

jolli1 [7]

Answer: $ 14736 (approx)

Step-by-step explanation:

Since, Maturity value is the amount payable to an investor at the end of a holding period of debt instrument.

And, It is defined as, $V= P(1+r)^n$

Where, P is the principal amount,

r is the interest rate

And, n is the time period.

Here, P= $4,400 r= 12 % and n = 172/365

Thus, Maturity value for this loan,

$V = 4400(1+12)^{172/365}$

⇒V= 4400 × 3.34908932078 = 14735.9930114 ≈ 14736

6 0

3 years ago