All categories

4 years ago

The length of

Mathematics

2 answers:

notka56 [123]4 years ago

8 0

Answer:

B. 12

Step-by-step explanation:

i took da testttt

Aleonysh [2.5K]4 years ago

7 0

I would say 24 considering your in middle school and maybe learning about rectangles or parallels

You might be interested in

Evaluate the function below for x=3 F(x)= 2x^3-x^2-4x+9

agasfer [191]

Answer:

Step-by-step explanation:

f(3)=2(3)^3-(3)^2-4(3)+9

f(3)=2(27)-(9)-12+9

f(3)=54-21+9

f(3)=33+9

f(3)=42

3 0

4 years ago

Find the length of AC Use that length to find the length of

Gekata [30.6K]

Answer:

1. AC = 5 cm

2. CD = 10.7 cm

Step-by-step explanation:

Looking at the left triangle, we see that AC is the side "opposite" of the angle given and AB is the "hypotenuse".

Which trigonometric ratio relates "opposite" to "hypotenuse"?

Yes, that's SINE.

So we can write:

$Sin(30)=\frac{AC}{10}\\AC=10*Sin(30)$

We know from 30-60-90 triangle, Sin(30) = 0.5, so we have:

$AC=10*Sin(30)\\AC=10*0.5\\AC=5$

Thus,

AC = 5 cm

Now, looking at right side triangle, we know AC, side "opposite" and we want to find CD, side "adjacent". Which trig ratio relates these 2 sides?

Yes, that's tan!

Thus we can write:

$Tan(25)=\frac{5}{CD}\\CD=\frac{5}{Tan(25)}$

Now using calculator, we get our answer to be:

CD = $\frac{5}{Tan(25)}=10.7$

CD = 10.7 cm

8 0

3 years ago

The thickness (in millimeters) of the coating applied to hard drives is one characteristic that determines the usefulness of the

Ede4ka [16]

Answer:

The sampling distribution of X, for a sample of size 16, will be approximately normal with mean 2 mm and standard deviation 0.01 mm.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .