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asambeis [7]
4 years ago
10

The ___________ of a lens or mirror is a rotational symmetry axis of the surfaces.

Mathematics
1 answer:
densk [106]4 years ago
5 0

Answer:

Optical axis

Step-by-step explanation:

Optical axis is the rotational symmetry axis of the surfaces.

A line with a certain degree of rotational symmetry is called as the optical axis in an optical system.

It is the straight line that passes through the geometric center of the lens and joins two curvature centers of its surfaces.

It is also called as the principal axis.

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Write down the factors of 55. Is 55 a prime or composite number? Explain how you know.​
horsena [70]

Answer:

Composite.

Step-by-step explanation:

because Prime numbers can only be recived when mulipltiy the number and itself, like 3.

55 can be mulipled by 1 AND 11 to get 55

4 0
3 years ago
Read 2 more answers
Kate prepared 9 kilograms of dough after working 3 hours. How many hours did Kate work if she prepared 12 kilograms of dough? As
beks73 [17]

Answer:

4 hours

Step-by-step explanation:

cross multiply

3 0
3 years ago
The two-way table below describes the quality of sweatshirts and T-shirts screen printed at a local store.
zhuklara [117]

Answer:

There is an association because the relative frequencies by row are different.

Step-by-step explanation:

The relative frequencies by row are:

90 perfect t-shirts out of 90+6=96 t-shirts is:

90/96 = 0.9375

6 flawed t-shirts out of 96 t-shirts is:

6/96 = 0.0625

40 perfect sweatshirts out of 40+10=50 sweatshirts is:

40/50 = 0.8

10 flawed sweatshirts out of 50 sweatshirts is:

10/50 = 0.2

The relative frequencies by row are different; this means there is an association.

4 0
4 years ago
Read 2 more answers
A digital camera costs $185 and the sales tax rate is 5.7%. What is the total cost of the camera after tax
Dovator [93]
♥ To solve find how much this will cost AFTER the price increases.
♥ Solve:
Multiply the original price as it is by: <span>1.057 (5.7 as a decimal would be 0.057, but as i said to keep the original price, the 1 will keep it there.) 
</span>185 * 1.057 = $195.545
Final answer: <span>$195.54</span>
7 0
3 years ago
If four blue marbles and eight non-blue marbles make a probability of 0.33, how many non-blue marbles do you need to combine wit
den301095 [7]

The number of non-blue marbles you need to combine with the blue marbles to achieve a probability of 0.1 is 28.

<h3>How many non-blue marbles are needed?</h3>

Probability determines the odds that a random event would happen. The probability the event occurs is 1 and the probability that the event does not occur is 0.

The more likely the event is to happen, the closer the probability value would be to 1. The less likely it is for the event not to happen, the closer the probability value would be to zero.

Probability of picking a blue marble = number of blue marble / total number of marbles

4 / (4 + 8)

4/12 = 0.33

The number of non-blue marbles needed = ( 4 / 0.1) - 12

40 - 12 = 28

To learn more about probability, please check: brainly.com/question/13234031

#SPJ1

5 0
2 years ago
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