Step-by-step explanation:
We have,
The frequency of note A is 880 Hz and the frequency of note D is 1175 Hz. It is required to find the ratio of D to A.
It means .
Using the values of frequency of D and A. So,
In decimal form,
In integer form,
What are the roots of the equation 2x2 13x + 25 = 0 in simplest a + bi form?
1 answer:
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Answer:
C)-2(9+32n)
Step-by-step explanation:
The given expresion is
We can rewrite this expression as:
We factor -2 to obtain:
Note that, we can use the distributive property to obtain:
Therefore the correct answer is C)-2(9+32n)
For this case we have the following quadratic equation:
By the time the projectile hits the ground we have the final height equal to zero:
Therefore, we have a second-order polynomial that we must solve:
Using resolver we have:
Rewriting:
Doing the calculations we have two roots:
We discard the negative root because we are looking for time which is greater than zero.
Answer:
the projectile will hit the ground after:
C. 5.3 seconds
By the time the projectile hits the ground we have the final height equal to zero:
Therefore, we have a second-order polynomial that we must solve:
Using resolver we have:
Rewriting:
Doing the calculations we have two roots:
We discard the negative root because we are looking for time which is greater than zero.
Answer:
the projectile will hit the ground after:
C. 5.3 seconds