All categories

2 years ago

The top rail of a boat is 4 ft out of the water. If the water rises 3 ft, how far out of

Mathematics

1 answer:

olya-2409 [2.1K]2 years ago

8 0

Answer:

the correct answer is 1ft

Step-by-step explanation:

4ft-3ft

=1ft

You might be interested in

Thomas goes to summer camp every year if his parents drive 155 miles to Camp to drop him off and then go back to pick him up in

prisoha [69]

I would say 465 since they go back and forth twice which is 155 x 3

8 0

2 years ago

Which is a correct first step in solving 5 – 2x < 8x – 3?

bezimeni [28]

Answer:

$\sf{5 < 10x - 3}$

Step-by-step explanation:

Hope it helps

3 0

1 year ago

Plz help theses are exponents

ohaa [14]

For number 30 its 3
10

for 34 its 2
1/3

3 0

3 years ago

The line is given by equation y–1.5x = c. What is the value of c if the line passes through the point K (2, –3).

aleksandr82 [10.1K]

Answer:

c = -6

Step-by-step explanation:

To find the value of c to make the line pass through the point K = (2, -3), we just need to use the values of x = 2 and y = -3 in the equation, then we find the value of c.

So, we have that:

y - 1.5*x = c

(-3) - 1.5 * (2) = c

-3 - 3 = c

c = -6

So the value of c is -6

To check if the value is correct, we can use the value x = 2 and see if the value of y is -3:

y - 1.5*x = -6

y - 1.5*2 = -6

y - 3 = -6

y = -6 + 3 = -3

So it's correct.

7 0

3 years ago

Read 2 more answers

You are planning a survey of starting salaries for recent computer science majors. In a recent survey by the National Associatio

nydimaria [60]

Answer:

A sample size of 554 is needed.

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 $1 - \alpha$ .

That 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.

Standard deviation is known to be $12,000

This means that $\sigma = 12000$

What sample size do you need to have a margin of error equal to $1000, with 95% confidence?

This is n for which M = 1000. So

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

$1000 = 1.96\frac{12000}{\sqrt{n}}$

$1000\sqrt{n} = 1.96*12$

Dividing both sides by 1000:

$\sqrt{n} = 1.96*12$

$(\sqrt{n})^2 = (1.96*12)^2$

$n = 553.2$

Rounding up:

A sample size of 554 is needed.

5 0

2 years ago