All categories

2 years ago

A rectangle is 3 feet long by 4 feet wide

Mathematics

2 answers:

egoroff_w [7]2 years ago

7 0

Answer:

20ft^2

Step-by-step explanation:

The length is currently three feet, if you add two feet to three that makes five feet. Five times four is twenty.

I hope this helps!

igomit [66]2 years ago

3 0

Answer:

$20 ft^{2}$

Step-by-step explanation:

A rectangle's formula for area is:

$Area=L(w)$

Let's use the formula to find the area first.

Multiply the Length and Width:

3 · 4 = 12.

12 is our area for the previous rectangle.

Our new rectangle has a length of 3+2, and a width of 4.

Let's use the formula again to find the area of our new rectangle.

Multiply 5 by 4:

5 · 4 = 20.

The area of the new rectangle is $20ft^{2}$

You might be interested in

Find JOM (I WILL MARK BRAINLY)

oee [108]

180-170=10 degrees
hope this helps :D

7 0

3 years ago

Read 2 more answers

Help help help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Zielflug [23.3K]

Answer:

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

I don’t understand this

loris [4]

Answer:

62°

Step-by-step explanation:

The vertex angle is half the difference of the intercepted arc angles.

∠A = ½ (CE − BD)

x = ½ (4x − 10 − 26)

x = ½ (4x − 36)

x = 2x − 18

18 = x

Therefore, the measure of CE is:

4(18) − 10 = 62

3 0

4 years ago

What is the answer for 47

bazaltina [42]

A, because the equation shows that G is opposite number for P.

7 0

3 years ago

The Highway Safety Department wants to study the driving habits of individuals. A sample of 40 cars traveling on a particular st

Ipatiy [6.2K]

Answer:

We need a sample size of at least 101

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:

$\alpha = \frac{1-0.99}{2} = 0.005$

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 $1-0.005 = 0.995$ , so $z = 2.575$

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.

What sample size is needed to estimate the true average speed to within 2 mph at 99% confidence?

We need a sample of at least n.

n is found when M = 2. So

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

$2 = 2.575*\frac{7.8}{\sqrt{n}}$

$2\sqrt{n} = 2.575*7.8$

$\sqrt{n} = \frac{2.575*7.8}{2}$

$(\sqrt{n})^{2} = (\frac{2.575*7.8}{2})^{2}$

$n = 100.85$

Rounding up

We need a sample size of at least 101

8 0

3 years ago

Read 2 more answers