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malfutka [58]
3 years ago
5

A reflecting telescope contains a mirror shaped like a parabola of revolution. If the mirror is 16 inches across at its opening

and is 2 feet deep, where will the light be concentrated?
Mathematics
1 answer:
choli [55]3 years ago
5 0

Answer:

18

Step-by-step explanation:

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I NEED HELP PLEASEEEEEEEEEEEEEEEEEEEEEEEEE
ser-zykov [4K]

Answer:

58 square feet

Step-by-step explanation:

The room is already broken down into two smaller rectangles.

The smaller of the two measures 4 ft by 2 ft. A=lw, so substitute 4 for l and 2 for w.

A(smaller rectangle) =(4)(2), or (4*2).

A(smaller rectangle) =8

The larger measures 10 ft by 5 ft, so using the same method, multiply l times w.

A(larger rectangle) =(10)(5), or (10*5).

A(larger rectangle) =50

Add the two rectangles' areas together to find the total area of the room.

8 + 50 = 58

8 0
3 years ago
How many different integers between $100$ and $500$ are multiples of either $6,$ $8,$ or both?
nirvana33 [79]
We need to find the number of integers between 100 and 500 that can be divided by 6, 8, or both. Now, to do this, we must as to how many are divisible by 6 and how many are multiples of 8.

The closest number to 100 that is divisible by 6 is 102. 498 is the multiple of 6 closest to 500. To find the number of multiple of 6 from 102 to 498, we have

n = \frac{498-102}{6} + 1
n = 67

We can use the same approach, to find the number of integers that are divisible by 8 between 100 and 500. 

n = \frac{496-104}{8} + 1
n = 50

That means there are 67 integers that are divisible by 6 and 50 integers divisible by 8. Remember that 6 and 8 share a common multiple of 24. That means the numbers 24,  48, 72, 96, etc are included in both lists. As shown below, there are 16 numbers that are multiples of 24.

n = \frac{480-120}{24} + 1
n = 16

Since we counted them twice, we subtract the number of integers that are divisible by 24 and have a final total of 67 + 50 - 16 = 101. Hence there are 101 integers that are divisible by 6, 8, or both.

Answer: 101


8 0
2 years ago
Divide.round your answer to the nearest hundredth 1divide 3
Sonbull [250]

Answer:

.33

Step-by-step explanation:

<em>Hey there!</em>

1 / 3

= .333333333

.33 rounded to the nearest hundredth

<em>Hope this helps :)</em>

3 0
2 years ago
HELPPPP I DONT HAVE MUCH TIME the question is what is the rate of change of the function?
Arada [10]

Answer:

2

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
12 cm<br> What is the radius of the cone?<br> 1 cm<br> 2 cm<br> 4 cm<br> 8 cm<br> V = 167 cm
MakcuM [25]

Answer:

what's the height? and are the numbers listed multiple choice?

3 0
3 years ago
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