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3 years ago

A diver is standing on a platform 7 ft above the pool.

Mathematics

1 answer:

VikaD [51]3 years ago

6 0

Answer:

13 ft

Step-by-step explanation:

We assume your height formula is intended to be ...

h(t) = -16t² +20t +7

This will have its maximum value at ...

t = -b/(2a) = -20/(2(-16)) = 5/8

The height at that time is ...

h(5/8) = (-16(5/8) +20)(5/8) +7 = 10(5/8) +7 = 106/8 = 53/4 = 13 1/4 . . . ft

To the nearest whole foot, the diver will reach a height of 13 ft above the pool.

_____

Additional comments

The standard form quadratic can be described as ...

f(x) = ax² +bx +c

The extreme value occurs at ...

x = -b/(2a)

This can also be written as ...

f(x) = (ax +b)x +c

which can make it easier to evaluate for some numerical value of x.

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X=1, X^2=X, X^2-1=X-1, (X+1)(X-1)=X-1, X+1=1, X=0 Where is the mastic?

Alchen [17]

Answer:

You are technically dividing by zero, it breaks math.

In the step (X+1)(X-1)=X-1 → X+1=1.

You divide (X+1)(X-1)=X-1 by (x-1) on both sides to get:

(x+1)(x-1) / (x-1) = (x-1) / (x-1).

Since x = 1,

(x + 1)(x - 1) / (x - 1) = (x - 1) / (x - 1)

becomes (2)(0) / 0 = 0 / 0.

And when you divide by zero, it's undefined since you cannot multiply a number by zero and get a number other than zero, it's undefinable.

This is where limits come in, when you divide by a variable, you have to assumed that is it ≠ 0.

You know that 1 ≠ 2, and 0 ≠ 1, and so on.

As dividing by zero approaches infinity,

1/0.1 = 10, 1/0.01 = 100, 1/0.001 = 1000, 1/0.00..1 = 1000.. → 1/0 → infinity.

1/-0.1 = -10, 1/-0.01 = -100, 1/-0.001 = -1000,

1/-0.00..1 = -1000.. → 1/0 → -infinity.

This suggests that dividing by zero should be infinity.

Therefore infinity = -infinity, Wrong.

When you are dividing, you are really asking yourself, how many times does this number fit into the other number.

1 cannot fit into 0, there isn't anything to fit into. This can also be thought of as:

1 = 0 + 0 + 0 + 0 + 0 + ......

0 + 0 = 0, so 1 ≠ 0.

5 0

3 years ago

Evaluate the expression a-b/c*d when a=48, b=18, c=3, and d=2

barxatty [35]

$\huge{\boxed{36}}$

Substitute the values. $48 - 18 \div 3 * 2$

Follow PEMDAS and multiply and divide first. $48 - 6 * 2$

$48 - 12$

Continue following PEMDAS and subtract. $\boxed{36}$

4 0

4 years ago

Please i need your help !

Butoxors [25]

The answer is D the last one

3 0

3 years ago

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Thelearningodyssey.com/gatekeeper.aspx?INTERNAL=SESSION

Alika [10]

Answer:

Explanation:

8 0

3 years ago

15. PLEASE HELP ME

Nana76 [90]

Surface Area=7238in^2

We know

$\boxed{\sf Surface\:area=4\pi r^2}$

$\\ \sf\longmapsto 4\pi r^2=7238$

$\\ \sf\longmapsto 4\times \dfrac{22}{7}r^2=7238$

$\\ \sf\longmapsto r^2=\dfrac{7238\times 7}{88}$

$\\ \sf\longmapsto r^2=\dfrac{5066}{88}$

$\\ \sf\longmapsto r^2=575.75$

$\\ \sf\longmapsto r^2\approx576$

$\\ \sf\longmapsto r\approx\sqrt{576}$

$\\ \sf\longmapsto r\approx24in$

<h3>Option b is coreect</h3>

4 0

3 years ago

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