1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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:

You might be interested in
Help!! Giving brainless need help
charle [14.2K]

Answer:

A. 15

Step-by-step explanation:

V of a right prism which this is. Is LxWxH

So 1.5x 4x2.5=15

4 0
3 years ago
Read 2 more answers
Greenfield village is spread across 240 acres of land. Only 37% of the land is used for the exhibits, while the rest of the land
Sergeeva-Olga [200]

Answer:

The land which are used for exhibits are <u>89 acres</u> (approximately).

Step-by-step explanation:

Given:

Village is spread across 240 acres of land. 37%  of land is used for the exhibits.

Now, we have to find acres of land which are used for exhibits.

So, here it is given that land used for exhibits is 37%, and we have to calculate the quantity from the percentage given:

According to question:

37% of 240 acres of land.

\frac{37}{100}\times 240

0.37\times 240

88.80

So, the land used for exhibits are 88.80 acres.

Therefore, the land which are used for exhibits are <u>89 acres </u>(approximately).

5 0
4 years ago
Help me asap please
iren [92.7K]

A(-3, -1); B(2, -1), C(2, 3)

You can read the length of AB and BC.

|AB| = 5

|BC| = 4

Use the Pythagorean theorem:

|AC|^2=5^2+4^2\\\\|AC|^2=25+16\\\\|AC|^2=41\to|AC|=\sqrt{41}\\\\|AC|\approx6.4

The perimeter:

P=|AB|+|BC|+|AC|\\\\P=5+4+6.4=15.4

7 0
3 years ago
Four students were discussing how to find the unit rate for a proportional relationship. Which method is valid? “Look at the gra
AlladinOne [14]

The correct answer is: [A]: " Look at the graph of the relationship.  Find the y-value of the point that corresponds to x = 1 . That value is the unit rate."

<h3>What is  y-value?</h3>

The vertical value in a pair of coordinates. How far up or down the point is. The Y Coordinate is always written second in an ordered pair of coordinates (x,y) such as (12,5). Also called "Ordinate".

Here, The "y-axis" is located on the "vertical axis" that represents the "dependent variable" (or, at times, the "control value") that cannot be "manipulated" / controlled/ or "selected" / since it represents the "y-value" of the corresponding coordinate to which the "x-value" happens to corresponds to at the given value for "x" .

Thus, the correct answer is: [A]: " Look at the graph of the relationship.  Find the y-value of the point that corresponds to x = 1 . That value is the unit rate."

Learn more about Y-value from:

brainly.com/question/3319387

#SPJ1

8 0
2 years ago
Determine an expression that would represent the area of the figure shown below:
Elan Coil [88]
The expression i determined is 10x + 6
5 0
3 years ago
Read 2 more answers
Other questions:
  • The midpoint of AB is M(-1, -2). If the coordinates of A are (1,3), what are the
    12·1 answer
  • If 400 dpi equals 3.6 and 800 equals 1.8. What does 1000 dpi equal to?
    8·1 answer
  • Is the answer B or C
    8·1 answer
  • Melissa's class spends 4 5 of an hour reading aloud in groups. Melissa and 5 other students are in one group. How much time is a
    10·1 answer
  • There is 12\15 of a pizza left. How many 3\10 pieces can be made from the leftover pizza?
    14·1 answer
  • Various studies indicate that approximately 11% of the world's population is left handed. You think this number is actually high
    11·1 answer
  • In a normal distribution, a data value located 0.8 standard deviations below the mean has Standard Score: z =
    8·1 answer
  • PLEASE HELP
    13·1 answer
  • Find the product of 3 - 1 and 7x^2- 4x- 8 using the Vertial Method
    14·1 answer
  • Find the slope of the line
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!