Answer: 7/20
Step-by-step explanation:
3/4 - 2/5
= 3x5/4x5 - 2x4/5x4
=15/20 - 8/20
= 7/20
Hope it helped u,
pls mark as the brainliest
^_^
The answer is k = 0 and for some reason this has to be 20 characters
For light: Inverse Square Law
<span>
The signal is weaken by the inverse square of the
difference of distances this means that one over the square of the
difference. </span>
<span>
</span>
Therefore, 70000LY / 141 LY =496.45 and that
squared =246462.602 times less signal, or 1/246462.602.
2 For a circular telescope like the
Arecibo radio telescope that equals Pi times the radius squared. Sensitivity
of the telescope depends on its area.<span>
The new telescope needs 246462.60 times that area to have
enough sensitivity </span>
<span>
<span>(150 x 150 x Pi) = 70 685 sq m area for the Arecibo telescope
and that times 246462.60
= 1.74212 x 10^10</span></span>
<span><span>
</span></span>
What is the diameter of a circle with that area?
<span>
<span>1. Divide the area by Pi = 5.548156 x 10^9
2. Take the square root of the result to find the radius = 74485.94293</span></span>
3. Multiply by 2 to find the diameter =
<span>148971.886</span>
Answer: True
Explanation: To add mixed numbers, first add the fractions.
So here, we have 4/9 + 6/9 which is 10/9.
Then add the whole numbers.
So we have 1 + 2 which is 3.
So our answer is 3 and 10/9.
But notice, that since 10/9 is an improper fraction,
our answer is not in lowest terms.
10/9 can be rewritten as the mixed number 1 and 1/9.
So 3 and 10/9 is the same as 3 + 1 and 1/9 which is 4 and 1/9.
Since 4 and 1/9 is in lowest terms, this is our final answer.
So we can say that 1 and 4/9 + 2 and 6/9 is 4 and 1/9.
