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2 years ago

Franco read of a chapter of his history book in § of an hour. At this rate, how many chapters of his history book

Mathematics

1 answer:

hichkok12 [17]2 years ago

3 0

Answer:

1 7/8

Step-by-step explanation:

dont know lol but trust me

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Hector invests $20,000 at age 21. He hopes the investment will be worth $200,000 when he turns 40. If the interest compounds con

KiRa [710]

Answer:

12.12%

Step-by-step explanation:

We have that the formula is given by:

A = p * e ^ (r * t)

From here, we know that A = 200000; p = 20000 and the time we can calculate 40 - 21 = 19

if we replace we have:

200000 = 20000 * e ^ (19 * r)

we must calculate r:

e ^ (19 * r) = 200000/20000

e ^ (19 * r) = 10

19 * r = ln 10

r = ln 10/19

r = 0.1212

In other words, the rate of growth is 12.12%

8 0

3 years ago

Read 2 more answers

If point P(2,-4) is reflected over the x-axis, determine the coordinates of the image.

timofeeve [1]

The coordinates would be (2,4)
Hope This Helps!

7 0

2 years ago

Read 2 more answers

What is the area of the equilateral triangle? Round to the nearest square centimeter. Do not include units

ziro4ka [17]

The answer should be around 28 square centi. rounding from about 27.71

5 0

3 years ago

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5. A study found that the average time it took a person to find their dream home was 5.9 months. If a sample of

solong [7]

Answer:

The 95% confidence interval of the mean time it took a person to find their dream home is between 5.64 months and 6.16 months.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 1.96\frac{0.8}{\sqrt{36}} = 0.26$

The lower end of the interval is the sample mean subtracted by M. So it is 5.9 - 0.26 = 5.64 months

The upper end of the interval is the sample mean added to M. So it is 5.9 + 0.26 = 6.16 months.

The 95% confidence interval of the mean time it took a person to find their dream home is between 5.64 months and 6.16 months.

4 0

3 years ago

Aryana's hair grows 0.5 cm per month. How long will her hair grow in 5 months? Show using a model and/or box method.

liq [111]

Answer:

o.5*5=2.5

Step-by-step explanation:

2,5

5 0

3 years ago

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