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3 years ago

5

Is 5.78778777 irrational or rational?

1 answer:

VikaD [51]3 years ago

5 0

it depends if that's a rounded answer. If that's rounded, then yes, it's irrational. If not, then it is rational.

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HELPPPPPPPPPPPPPPPPP

emmasim [6.3K]

For this case, what you should see is where the graph cuts the x-axis.
Notice that the graph cuts to the x axis in three different points.
Then the value of x that is in the domain of the function in this case is:
x = 1
For this value of x the function is zero.
Answer:
x = 1

5 0

3 years ago

Read 2 more answers

If X = 4 units, Y = 3 units, and Z = 10 units, then what is the volume of the triangular pyramid shown above?

Levart [38]

Answer:

40

Step-by-step explanation:

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2 years ago

How to rewrite the sum of 96 80 using distributive property?

elena-14-01-66 [18.8K]

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4 0

3 years ago

Keegan is printing and selling his original design on t-shirts. He has concluded that for x shirts, in thousands sold his total

Katarina [22]

Answer:

t-shirts: 2790

profit: $12209

Step-by-step explanation:

Given the function:

p(x) = -x³ + 4x² + x

we want to maximize it.

The following criteria must be satisfied at the maximum:

dp/dx = 0

d²p/dx² < 0

dp/dx = -3x² + 8x + 1 = 0

Using quadratic formula:

$x = \frac{-b \pm \sqrt{b^2 -4(a)(c)}}{2(a)}$

$x = \frac{-8 \pm \sqrt{8^2 -4(-3)(1)}}{2(-3)}$

$x = \frac{-8 \pm 8.72}{-6}$

$x_1 = \frac{-8 + 8.72}{-6}$

$x_1 = -0.12$

$x_2 = \frac{-8 - 8.72}{-6}$

$x_2 = 2.79$

d²p/dx² = -6x + 8

d²p/dx² at x = -0.12: -6(-0.12) + 8 = 8.72 > 0

d²p/dx² at x = 2.79: -6(2.79) + 8 = -8.74 < 0

Then, he should prints 2.79 thousands, that is, 2790 t-shirts to make maximum profits.

Replacing into profit equation:

p(x) = -(2.79)³ + 4(2.79)² + 2.79 = 12.209

that is, $12209

3 0

3 years ago

A delivery fee for tuber eats was 10

yaroslaw [1]

$10.63
the work is shown below

5 0

3 years ago