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kherson [118]
3 years ago
9

Which part of the eye acts as a secondary area of refraction to "fine tune" the focus?

Mathematics
1 answer:
makkiz [27]3 years ago
3 0

Answer:

The lens

Step-by-step explanation:

The lens of the eye is a biconvex, transparent structure of the eye that helps in refraction along with the cornea.

Hope this helps!!

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Angela left for work at 8:30 a.m. She returned to school at 11:30 a.m. How long was Angela at work?
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Angela was at work for 15 hrs.

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What is a positive angle less than 360 degrees that is conterminal with -289 degrees
wel

Answer:

The positive angle that less than 360° and is conterminal with -289° is 71°

Step-by-step explanation:

  • When a terminal of an angle moves anticlockwise, then it makes a positive angle with the positive part of the x-axis
  • When a terminal of an angle moves clockwise, then it makes a negative angle with the positive part of the x-axis
  • To find the positive angle which has the same terminal of a negative angle add the measure of the negative angle by 360°

Let us solve the question

∵ The measure of the angle is -289°

→ Add its measure by 360° to find the positive angle that is conterminal

   with it

∵ The measure of the positive angle = -289° + 360°

∴ The measure of the positive angle = 71°

The positive angle that less than 360° and is conterminal with -289° is 71°

4 0
3 years ago
What’s the solution for 6(2m - 3) - 3m= 2m - 18 + m
katen-ka-za [31]

Answer:

12m-18-3m=2m+m-18

9m-18= 3m-18

9m-3m=18-18

6m=0

m=0/6=0

Step-by-step explanation:

5 0
3 years ago
It is given that A is directly proportional to r2 and r> 0. When r=5, A=75.
torisob [31]

Answer:

see explanation

Step-by-step explanation:

Given A is directly proportional to r² then the equation relating them is

A = kr² ← k is the constant of proportion

To find k use the condition when r = 5, A = 75 , then

75 = k × 5² = 25k ( divide both sides by 25 )

3 = k

A = 3r² ← equation of proportion

(a)

when r = 4, then

A = 3 × 4² = 3 × 16 = 48

(b)

when A = 147 , then

147 = 3r² ( divide both sides by 3 )

49 = r² ( take the square root of both sides )

r = \sqrt{49} = 7

3 0
2 years ago
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