2 years ago

I've been stuck on this for a bit.

1 answer:

3 0

B is 1 because 1 - -3 equals positive 4 divided by 4 equals 1. C is 22 because 4 squared is 16 multiplied by 2 equals 32 -3 -7=22. D is 27 because 4-7 equals -3, -3 squared is 9 times 3 equals 27.

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Karolina [17]

Answer:

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2 years ago

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The depth of a scuba diver can be modeled by the equation d 0.5t (3.5t- 28.25), where d is the depth in meters of the diver and

user100 [1]

We know that

using a graph tool
see the attached figure

The diver reaches the surface when d = 0
so
0.5t (3.5t- 28.25)=0---------> the solution is
0.5t=0--------> t=0
and
(3.5t- 28.25)=0----------> 3.5t=28.25--------> t=28.25/3.5--------> t=8.07 minutes


the time it takes for the diver to reach the surface is when the depth is zero
the time is 8 minutes

the answer is
8 minutes