<u>Given</u>:
The given equation is 
We need to determine the exact solutions of the equation.
<u>Exact solution:</u>
The exact solution of the equation can be determined by solving the equation using quadratic formula,

From the equation the values are a = 1, b = -3 and c = -7
Thus, substituting these values in the equation, we get;



Thus, the exact solutions of the given equation is 
Hence, Option A is the correct answer.
T has 4 times what R has, so 2.105*4 which is 8.42
Correct answer is the 4th choice 16!!!
Hope this helps!!!
Answer:
<em>Hope the link helps! Sorry I didn't explain. I couldn't find the less than sign. </em>
<h2>
Answer:</h2>
<u>x= 90°</u>.
<h2>
Step-by-step explanation:</h2>
<h3>1. Write the expression.</h3>

<h3>2. Subtract "4" from both sides of the equation.</h3>

<h3>3. Add "8sin(x)" to both sides of the equation.</h3>

<h3>4. Divide both sides by 10.</h3>

<h3>5. Apply the arcsin of sin^-1 to both sides of the equation.</h3>

<h3>6. Conclude.</h3>
<u>x= 90°</u>.