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3 years ago

It takes Bonnie 18 minutes to vacuum

Mathematics

2 answers:

Shkiper50 [21]3 years ago

8 0

18/2 = 9 per room
9*4 = 36 minutes for 4 rooms

diamong [38]3 years ago

4 0

Answer:

36 min

Step-by-step explanation: 18 divided by 2 is 9. so 9x 4 is 36

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The length of overline CD is 12 units. C^ prime D^ prime is the image of overline CD under a dilation with a scale factor of n.

Rufina [12.5K]

Answer:

A, D , and E

Step-by-step explanation:

We have that:

$\overline{CD} = 12 \: units$

$\overline{C'D'}$

is the image of CD after a dilation of scale factor n.

We use the relation between the image length and object length:

$\overline{C'D'} = n \times \overline{CD}$

Option A

If n=3/2, then

$\overline{C'D'} = \frac{3}{2} \times 12 = 3 \times 6 = 18 \: units$

This is true.

Option B

If n=4, then

$\overline{C'D'} = 4 \times 12 = 36 \: units$

This is false.

Option C

If n=8, then

$\overline{C'D'} = 8 \times 12 = 96 \: units$

This too is false.

Option D

If n=2, then

$\overline{C'D'} = 2 \times 12 = 24 \: units$

This is true

Option E

If n=3/4, then

$\overline{C'D'} = \frac{3}{4} \times 12$

$\overline{C'D'} = 3 \times 3 = 9 \: units$

This is also true.

4 0

3 years ago

A central angle theta in a circle of radius 7 m is subtended by an arc of length 8 m. Find the measure of theta in degrees. (Rou

gogolik [260]

Answer: In degrees , The measure of $\theta=65.5^{\circ}$

In radians , the measure of $\theta =\dfrac{8}{7}\text{ radians}$ .

Step-by-step explanation:

We know that the formula for length of arc is given by :-

$l=\theta r$

, where $\theta$ = Central angle subtended by arc.

r= radius of the circle.

As per given , we have

Radius of circle : r=7 m

Length of arc : l= 8 m

Substitute these values in the above formula , we get

$8=\theta (7)\\\\\Rightarrow\ \theta =\dfrac{8}{7}\text{ radians}$

Hence, the measure of $\theta =\dfrac{8}{7}\text{ radians}$ .

To convert it into degrees we multiply it with $\dfrac{180^{\circ}}{\pi}$

The measure of $\theta =\dfrac{8}{7}\times\dfrac{180^{\circ}}{\pi}$

$=(\dfrac{8\times180}{7\times3.14})^{\circ}=65.5141037307^{\circ}$

$\approx65.5^{\circ}$

Hence, the measure of $\theta=65.5^{\circ}$

8 0

3 years ago

Original price of an apple watch: $299.00 Sales Tax: 7%

bixtya [17]

20.93 is 7% of that

7 0

2 years ago

What is 0.7, 7/9, 7/8 in order from greatest to least

Sphinxa [80]

Simple...

change them all into fractions or decimals...

0.7---> 0.7

$\frac{7}{9}$ -->>0.77

$\frac{7}{8}$ --->>0.875

Ordering from greatest to least....

0.875-->>0.77-->>0.7

$\frac{7}{8}$ -->> $\frac{7}{9}$ -->>0.7

Thud, your answer.

5 0

2 years ago

What angle of rotation does the letter s have? a. 0° b. 90° c. 120° d. 180°

anyanavicka [17]

I think it is d.180°

8 0

3 years ago