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3 years ago

Write an explicit formula for an, the nth term of the sequence 15, 12,9,....

Mathematics

1 answer:

Dmitry [639]3 years ago

3 0

Answer:

18-3n

Step-by-step explanation:

18-3(1)=15

18-3(2)=12

etc

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Day Care Tuition A random sample of 50 four-year-olds attending day care centers provided a yearly tuition average of $3987 and

olasank [31]

Answer:

We have to find the 90% confidence interval for the mean

Given sample size

Sample mean

Population standard deviation

Here the confidence level is 90% then

And

The 90% confidence interval is

Here is the critical value at 0.05

From the tables

Now the 90% confidence interval is =

=(3840.44, 4133.56)

Hence the 90% confidence interval for the mean is (3840.44, 4133.56)

5 0

3 years ago

Hudson is driving on a long road trip. He currently has 13 gallons of gas in his car.

dybincka [34]

Answer:

There would be 11 gallons of gas left!

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

A decorative steel is shown and it is made of a circular section and 6 stems. The length of each stem is 45cm Work out the lengt

Lelechka [254]

Answer: The required length of steel is 270 cm.

Step-by-step explanation:

Since we have given that

Number of stems = 6

Length of each stem = 45 cm

So, we need to find the length of steel used in the frame.

So, Length of steel = Number of stems × Length of each stem

So, the length of steel becomes

$45\times 6\\\\=270\ cm$

Hence, the required length of steel is 270 cm.

6 0

3 years ago

Write the expressions without using log. Can someone please help with this?

goldenfox [79]

$\bf \textit{logarithm of factors}\\\\
log_{{ a}}(xy)\implies log_{{ a}}(x)+log_{{ a}}(y)
\\\\\\
\textit{Logarithm of rationals}\\\\
log_{{ a}}\left( \frac{x}{y}\right)\implies log_{{ a}}(x)-log_{{ a}}(y)
\\\\\\
\textit{Logarithm of exponentials}\\\\
log_{{ a}}\left( x^{{ b}} \right)\implies {{ b}}\cdot log_{{ a}}(x)\\\\
-------------------------------$

$\bf log(m^3n)\implies log(m^3)+log(n)\implies 3log(m)+log(n)
\\\\\\
\boxed{3k+v}
\\\\\\
log\left(\cfrac{m}{n^3} \right)\implies log(m)-log(n^3)\implies log(m)-3log(n)
\\\\\\
\boxed{k-3v}$

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4 years ago

A. Melanie completed a long distance run at an average speed of 6 km/he, if it takes her 3 hours, how far did she run. What form

Andrews [41]

6*3= 18 km
30/10 = 3 km per hour then 2:00 to 2:10

5 0

3 years ago