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3 years ago

Trig review please help me

Mathematics

2 answers:

Nookie1986 [14]3 years ago

8 0

Answer:

B) $\sqrt{134}$ feet

Step2247 [10]3 years ago

4 0

Answer:

$\sqrt{134} \: ft$

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What is 12.38 in word form

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it will be twelve and thirty eight hundredths

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4 years ago

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For z = 2cispi/6, find z^5 in reactangular form.

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3 years ago

Sean tossed a coin off a bridge into the stream below. The path of the coin can be represented by the equation 2 h tt = − 16t^2+

tekilochka [14]

Answer:

It will take 5.61 seconds for the coin to reach the stream.

Step-by-step explanation:

The height of the coin, after t seconds, is given by the following equation:

$h(t) = -16t^{2} + 72t + 100$

How long will it take the coin to reach the stream?

The stream is the ground level.

So the coin reaches the stream when h(t) = 0.

$h(t) = -16t^{2} + 72t + 100$

$-16t^{2} + 72t + 100 = 0$

Multiplying by (-1)

$16t^{2} - 72t - 100 = 0$

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

$16t^{2} - 72t - 100 = 0$

$a = 16, b = -72, c = -100$

$\bigtriangleup = (-72)^{2} - 4*16*(-100) = 11584$

$t_{1} = \frac{-(-72) + \sqrt{11584}}{2*16} = 5.61$

$t_{2} = \frac{-(-72) - \sqrt{11584}}{2*16} = -1.11$

Time is a positive measure, so we take the positive value.

It will take 5.61 seconds for the coin to reach the stream.

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4 years ago

Multiply. Express the product in simplest form. 2 over 10 times 20 equals n A. 40 B. 20 C. 4 D. 1 over 100

vredina [299]

The answer is choice A-40 :)

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3 years ago

A river flows at the rate of 20 feet per minute What is the rate in seconds per foot?

masya89 [10]

The answer is 3. I hope this help!

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3 years ago