Answer:
45
Step-by-step explanation:
90+45=135 180-135 is 45
<span>$152.51
y o u r a n s w e r i s a b o v e
</span>
X% peans for every 100 objects, there are x objects.
Answer: Its light-collecting area would be 25 times greater than that of the 10-meter keck telescope.
Step-by-step explanation:
1. To solve this problem you must apply the formula for calculate the area of a circle, which is shown below:

Where<em> r</em> is the radius of the circle.
2. The diameter of a circle is:

Where <em>r</em> is the radius of the circle.
3. Therefore, keeping this on mind, you have that the light-collecting area of a 50-meter keck telescope is:

4. And the light-collecting area of a 10-meter keck telescope is:

5. Divide
by
, then:

6. Therefore, its light-collecting area would be 25 times greater than that of the 10-meter keck telescope.
Add up all the sides only, not the area inside