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trapecia [35]
3 years ago
7

The pressure, p, of water (in pounds per square foot) at a depth of d feet below the surface is given by the formula

Mathematics
1 answer:
allsm [11]3 years ago
3 0

Answer:

d

Step-by-step explanation:

Simplify the expression.

Exact Form:

665/11

Decimal Form:

60.45

Mixed Number Form:

60 5/11

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The number of gallons of water in a large tank at time (t) minutes is given by the function W(t)=160,000-8,000t+t². Find the ave
sergij07 [2.7K]

The number of gallons of water in the tank at t=10 is

... W(10) = 160,000 -10(8000 -10) = 80100

The number of gallons of water in the tank at t=10.5 is

... W(10.5) = 160,000 -10.5(8000 -10.5) = 76110.25

The rate of change over the interval is

... (W(10.5) - W(10))/(10.5 - 10) = (76110.25 - 80100)/(0.5) = -7979.5

The average rate of change in the number of gallons of water in the tank over the interval is -7979.5 gal/min.

The sign is negative, so the amount of water is decreasing.

3 0
3 years ago
Write the expression that appears under the radical symbol in the quadratic formula. what is the quality called? what can it be
ira [324]
This expression is called the Discriminant, also shown as Δ.
It is equal to b² - 4ac. This is a very important part of the quadratic formula as it determines whether x will have two values, one repeated value or no real values. Here are a few examples.

a) x² - 2x - 1. a is equal to 1 since 1x² = x². b = -2, c = -1
The discriminant will be (-2)² - 4×1×-1 = 4 + 4 = 8.
Since Δ > 0, there are two x values. Graphed, the parabola sinks below the x axis.

b) x². a = 1, b = 0 (0x = 0), c = 0
The discriminant will be 0² - 4×1×0 = 0 - 0 = 0.
Since Δ = 0, there is only one x value. Graphed, the parabola touches the x axis at only one point.

c) x² + 1. a = 1, c = 1.
The discriminant will be 0² - 4×1×1 = 0 - 4 = -4
Since Δ < 0, there are no real x values. Graphed, the parabola floats above the x axis.

Hope this helps!
8 0
2 years ago
Sarah kept track of the points she scored during her first five basketball games in the table shown. easy help
AURORKA [14]

Answer:

E

Step-by-step explanation:

If you add 22 onto the sum of all the points and divide by the amount of games (6), you get 12.

8 0
2 years ago
What is 20/5 in simplest form?
Anna007 [38]
It would be equal to 4

Hope this helps!
5 0
2 years ago
Please help -(2w+4.2x+3.4)
velikii [3]

Answer:

-2w - 4.2 - 3.4

Step-by-step explanation:

I use the calculator

3 0
3 years ago
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