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3 years ago

Please help, i need this done asap!

Mathematics

1 answer:

Bond [772]3 years ago

7 0

Answer:

$}\frac{\sqrt{2} }{2}$ or 0.707

Step-by-step explanation:

cos(315) is equivalent to cos ( $\frac{7\pi }{4}$ )

You can look at the unit circle to find the cos value for this. Keep in mind that cos is the x value of the corresponding coordinate.

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In a lottery game, a player picks six numbers from 1 to 27. If the player matches all six numbers, they win 40,000 dollars. Othe

Alexus [3.1K]

Answer:

We conclude that expected value of this game is -0.865$.

Step-by-step explanation:

We know that in a lottery game, a player picks six numbers from 1 to 27.

We know that

$C_6^{27}=296010$

As there is only one advantageous combination, we conclude that the number of non-winning combinations is 296009.

He can win 40,000 dollars.

We calculate:

$E(X)=\frac{1}{296010}\cdot 40000\$- \frac{296009}{296010}\cdot 1\$\\\\E(X)=\frac{40000-296009}{296010}\, \$\\\\E(X)=-0.865\, \$$

We conclude that expected value of this game is -0.865$.

7 0

3 years ago

Find the values of x, the lengths of AB and BC

yarga [219]

Answer: The picture is black lol

Step-by-step explanation:

7 0

3 years ago

D;the craft store discussed above, the clay cone is $12, the clay cylinder is $30, and the clay sphere is $28. Which is the best

777dan777 [17]

Answer:

the cylinder

Step-by-step explanation:

if you look at it the cylinder is the biggest and largest and take must of the space

3 0

2 years ago

If an archer shoots an arrow straight upward with an initial velocity of 160

HACTEHA [7]

Answer:

maximum height of the arrow will be 408 m

Step-by-step explanation:

We have given the function of height as $h(t)=-16t^2+160t+8$

We know that first derivative of height will be velocity

So first derivative of height

$\frac{dh}{dt}=-32t+160$

$v(t)=-32t+160$

We know that at maximum height velocity will be zero

$-32t+160=0$

t = 5 sec

Sp arrow will be at maximum height at t = 5 sec

So height at t = 5 sec will be

$h(5)=-16\times 5^2+160\times 5+8=408m$

So maximum height of the arrow will be 408 m

5 0

3 years ago

Simplify 2 +5 + (-4 +i)

rodikova [14]

Answer:

the answer is 4 because

2+5+(-4+1)

= 7+(-3)

=7-3

4 0

3 years ago