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3 years ago

An initial investment of $5,000 grows at 9% per year.

Mathematics

1 answer:

fredd [130]3 years ago

8 0

Answer:

C. f(t) = 5000(1.09)^t

Step-by-step explanation:

Compound interest formula:

F = P(1 + r)^t

Answer: C. f(t) = 5000(1.09)^t

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J more than 328 is the same as 264 as an equation

jarptica [38.1K]

Step-by-step explanation:

<u>Break down the word expression:</u>

j more than 328 is the same as 264 as an equation

'more' - addition (+)

'same' - equals to (=)

$j + 328 = 264$

8 0

3 years ago

What is the gcf of 18,54, and 72

dsp73

I think its 9 because 9 times 2 is 18 9 times 6 is 54 and 9 times 8 is 72

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3 years ago

Find a 90% confidence interval for the mean of all tree ring dates from this archaeological site. (round your answers to the nea

creativ13 [48]

Given a table below which gives the years in A.D. for an archaeological excavation site using the method of tree ring dating:

$\begin{tabular}
{|c|c|c|c|c|c|c|c|c|}
1229&1292&1187&1257&1268&1316&1275& 1317&1275
\end{tabular}$

Part A:

The sample mean is given by:

$\bar{x}= \frac{1229+1292+1187+1257+1268+1316+1275+ 1317+1275}{9} \\ \\ = \frac{11416}{9} =1268$

Therefore, the sample mean is 1268.

Part B:

We calculate the sample standard deviation as follows:

$s= \frac{1}{9-1} \left(\sqrt{(1229-1268)^2+(1292-1268)^2+(1187-1268)^2+(1257-1268)^2+(1268-1268)^2+(1316-1268)^2+(1275-1268)^2+(1317-1268)^2+(1275-1268)^2}\right)\\ \\ = \frac{1}{8}\left(\sqrt{(-39)^2+24^2+(-81)^2+(-11)^2+0^2+48^2+7^2+49^2+7^2}\right)\\ \\ = \frac{1}{8}\left(\sqrt{1521+576+6561+121+2304+49+2401+49}\right)\\ \\ = \frac{1}{8}\left(\sqrt{13,582}\right)\\ \\ = \frac{1}{8}(116.54)=14.57\approx15$

Part C:

The 90% confidence interval is given by:

$90\% \ C. \ I.=1268\pm1.65\left(\frac{15}{\sqrt{9}}\right) \\ \\ =1268\pm\left(\frac{15}{3}\right)=1268\pm5 \\ \\ =(1268-5, \ 1268+5)=(1263, \ 1273)$

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3 years ago

Help me out ffgggggggffccc

Aleksandr [31]

Answer:

72 units

Step-by-step explanation:

There are two ways to solve the problems.

Count graphically, horizontally there are 9 units, vertically there are 8 units in the rectangle. So the area is 9*8 = 72 units.

Alternatively, check the difference between two adjacent vertices,

1. between (4,-3) and (4,5), the difference is (0,8), or 8 units.

2. between (4,5) and (-5,5), the difference is (9,0), or 9 units.

So again, the area of the square is 8*9=72 units.

5 0

3 years ago

Kai, a seventh grader, wants to determine the average number of times the families in his neighborhood visit the pool during the

Eva8 [605]

Answer:

Step-by-step explanation:

Sample more families

sample families that have children who are not in seventh grade

sample families whose answer to the survey question is predetermined

5 0

3 years ago

Read 2 more answers