The answer is -12 because the 4 and 8 are negative
Answer:
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Step-by-step explanation:
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Explanation:</h2><h2>
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Here we know that Margie is standing on a bridge looking at the river. She throws a rock over the bridge with an initial velocity of 60 ft/sec. The height, h, of the rock at the rime t seconds after it was thrown can be modeled by the equation:

To calculate how long will it take for the rock to reach the surface of the water, we need to set
. So:

Given that time can't be negative, we just choose the positive value. Therefore, <em>it will take 4.70 seconds for the rock to reach the surface water.</em>
Answer:
See below ~
Step-by-step explanation:
<u>Sin A</u> : opposing side of ∠A / hypotenuse
<u>Sin C</u> : opposing side of ∠C / hypotenuse
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<u>Cos A</u> : adjacent side of ∠A / hypotenuse
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<u>Cos C</u> : adjacent side of ∠C / hypotenuse