Answer:
The answer is 1
Step-by-step explanation:
<em>The measure of PQ is 12.72</em>
<h2>
Explanation:</h2>
We have the right triangle ΔPQR and we want to know the measure of PQ. PQ is opposite to ∠R, so from trigonometry we know that:

<h2>Learn more:</h2>
Right triangles: brainly.com/question/10252821
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Answer : The grain of sand is 50 times greater than the phytoplankton.
Step-by-step explanation :
As we are given that:
Size of phytoplankton = 2 × 10⁻⁶ in
Size of sand grain = 1 × 10⁻⁴ in
Now we have to determine how many times longer the grain of sand is than the phytoplankton.
We are dividing the sand grain size by the phytoplankton size.
This can be done by equating it as follows:


Therefore, the grain of sand is 50 times greater than the phytoplankton.
Answer:B
Step-by-step explanation:
A is wrong because it's less than the 450.
D is wrong because 2 inches would equal 900. So, you're down to B or C. Multiply 450×1.4= 630. 450×1.5= 675. 630 is closer to 635, therefore it is the answer.