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Rom4ik [11]
3 years ago
7

A scuba diver is 30 feet below the surface of the water 10 seconds after he entered the water and 100 feet below the surface aft

er 40 seconds. What is the scuba diver's rate of change? Round to the nearest tenth.
Mathematics
1 answer:
den301095 [7]3 years ago
5 0

Answer:

2.3 feet/ second

Step-by-step explanation:

To find the rate of change, we will have to find the difference in his distance travelled and divide it by the time taken to move that distance.

This is given by rate of change = (change in position)/ change in time

From the question, his position changed from 30 ft to 100 ft thus the distance he travelled is = 100ft - 30 ft = 70 ft.

Time taken to travel this distance = 40 seconds - 10 seconds = 30 seconds

Diver's rate of travel = 70 ft / 30 seconds = 2.33333ft/second.

Rounding off the answer to the nearest tenth, we have 2.3 ft/second

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3 years ago
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Sergio039 [100]

Answer:

(4x^2 + 3)(x + 3)

Step-by-step explanation:

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the overhead, fixed costs, is $1000.

the variable cost is $200, so if she sells "x" tiles, then her costs is 200*x or 200x.

total costs then will just be C(x) = 200x + 1000.

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\bf \stackrel{R(x)}{240x}=\stackrel{C(x)}{220x+1000}\implies 20x=1000\implies x=\cfrac{1000}{20}\implies x=50

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3 years ago
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−x^2+5x−10=0

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you plug it in as shown below

and simplify

when you simplify

you get

as shown below

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Step-by-step explanation:

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