All categories

3 years ago

A scale on a drawing is 0.5 mm : 4 cm. the height of the drawing is 4.5 millimeters. what is the actual height of the object?

Mathematics

2 answers:

hoa [83]3 years ago

5 0

4.5 * 4 / 0.5 = 36 cm

garri49 [273]3 years ago

5 0

So this is what you do,
4.5 divided by .5 and that = 9
then you do 9x4 and you get 36
so your answer would be... 36 cm.

You might be interested in

Help pleaseeee it’s due in 27 mins

Nitella [24]

Answer:

X-intercepts: (-5,0)

Y-Intercepts: (0,2)

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

What’s 1+1 <br><br> 100 Points

Andrei [34K]

OH THANKS A LOT AND ITS 11

5 0

3 years ago

Read 2 more answers

Determine if the given mapping phi is a homomorphism on the given groups. If so, identify its kernel and whether or not the mapp

shtirl [24]

Answer:

(a) No. (b)Yes. (c)Yes. (d)Yes.

Step-by-step explanation:

(a) If $\phi: G \longrightarrow G$ is an homomorphism, then it must hold

that $b^{-1}a^{-1}=(ab)^{-1}=\phi(ab)=\phi(a)\phi(b)=a^{-1}b^{-1}$ ,

but the last statement is true if and only if G is abelian.

(b) Since G is abelian, it holds that

$\phi(a)\phi(b)=a^nb^n=(ab)^{n}=\phi(ab)$

which tells us that $\phi$ is a homorphism. The kernel of $\phi$

is the set of elements g in G such that $g^{n}=1$ . However,

$\phi$ is not necessarily 1-1 or onto, if $G=\mathbb{Z}_6$ and

n=3, we have

$kern(\phi)=\{0,2,4\} \quad \text{and} \quad\\\\Im(\phi)=\{0,3\}$

(c) If $z_1,z_2 \in \mathbb{C}^{\times}$ remeber that

$|z_1 \cdot z_2|=|z_1|\cdot|z_2|$ , which tells us that $\phi$ is a

homomorphism. In this case

$kern(\phi)=\{\quad z\in\mathbb{C} \quad | \quad |z|=1 \}$ , if we write a

complex number as $z=x+iy$ , then $|z|=x^2+y^2$ , which tells

us that $kern(\phi)$ is the unit circle. Moreover, since

$kern(\phi) \neq \{1\}$ the mapping is not 1-1, also if we take a negative

real number, it is not in the image of $\phi$ , which tells us that

$\phi$ is not surjective.

(d) Remember that $e^{ix}=\cos(x)+i\sin(x)$ , using this, it holds that

$\phi(x+y)=e^{i(x+y)}=e^{ix}e^{iy}=\phi(x)\phi(x)$

which tells us that $\phi$ is a homomorphism. By computing we see

that $kern(\phi)=\{2 \pi n| \quad n \in \mathbb{Z} \}$ and

$Im(\phi)$ is the unit circle, hence $\phi$ is neither injective nor

surjective.

7 0

3 years ago

you have 9.75 pages in your science book and 24.5 pages in your play book it takes you 1.2 minutes to read your science book and

Mazyrski [523]

Add the minutes it takes per book:-

1.2 + 0.8 = 2

You spend 2 minutes reading!

6 0

3 years ago

A car salesman earns 2% commission on all of his sales. If he needs to make $3,000 a month for his living expenses, what total d

Sonja [21]

He must sell 150,000 dollars worth of something to make 3,000 in commission each month.
I hope this helps!

8 0

3 years ago