1 year ago

Find the area of the triangle. [?] units²

Mathematics

1 answer:

mario62 [17]1 year ago

7 0

Answer:

Step-by-step explanation:

Area of any triangle is:

A = height * base / 2

You might be interested in

A number, n, is multiplied by negative 5/8. The product is negative 0.4. What is the value of n?

Liula [17]

-5/8 = 6.25

6.25n
Product: 0.4

0.4 divided by 6.25 = 0.064.

0.064 is the final answer.

7 0

3 years ago

Read 2 more answers

40 points!!! please help

masya89 [10]

Answer:

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

PLEASE HELP

borishaifa [10]

Answer:

50%(1/2) I geuss

Step-by-step explanation:

1/5=0.2=20%

20%+30%=50%

50%=1/2(or 2/4,or 3/6)

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

On a math test, 5 out of 20 students got an A. If three students are chosen at random without replacement, what is the probabili

Y_Kistochka [10]

Answer:

Step-by-step explanation:

7 0

4 years ago