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2 years ago

10

Lola tossed a coin twice. She made a tree diagram to show the possible outcomes. Which tree diagram shows the sample space for t

wo tosses of a coin?

1 answer:

Iteru [2.4K]2 years ago

3 0

Step-by-step explanation:

note : H for head, T for tail

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MAVERICK [17]

Stem|leaf data: 11 12 13 21 22 23
1|1 2 3
2| 1 2 3

You're basically just splitting the numbers up. Tens in the stem row and ones in the leaf row. I hope this helps you!

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One and two step equation error analysis.<br><br> Please help me.

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3 years ago

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A very large study showed that aspirin reduced the rate of heart attacks by 44%. A pharmaceutical company thinks they have a dru

Butoxors [25]

Answer: $H_0:\mu=0.44\ ,H_a:\mu$

Step-by-step explanation:

Since we have given that

A very large study showed that aspirin reduced the rate of heart attacks by 44%.

we claim that they have a drug that will be more effective than aspirin.

so, our hypothesis would be

$H_0:\mu=0.44\\\\H_a:\mu$

So, it will be one tail test.

Hence, $H_0:\mu=0.44\\\\H_a:\mu$

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3 years ago

A pizza restaurant offers 21 different toppings. How many 5-topping pizzas can be created if each topping can be used only once?

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4. 5 times 4 is 20. :)

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A rocket is launched from the top of a 55-foot cliff with an initial velocity of 138 ft/s.

melisa1 [442]

For this case we have that the equation that describes the height is:

$h = -16t ^ 2 + vt + c$

Where,

v: initial speed

c: initial height

Substituting values we have:

$h = -16t ^ 2 + 138t + 55$

Then, to find the time, we use the quadratic formula:

$t =\frac{-b +/-\sqrt{b^2 - 4ac} }{2a}$

Substituting values we have:

$t =\frac{-138 +/-\sqrt{138^2 - 4(-16)(55)} }{2(-16)}$

Rewriting:

$t =\frac{-138 +/-\sqrt{19044 + 3520} }{-32}$

$t =\frac{-138 +/-\sqrt{22564}}{-32}$

$t =\frac{-138 +/-150.21}{-32}$

We discard the negative root because we want to find the time.

We have then:

$t =\frac{-138 -150.21}{-32}$

$t =\frac{-288.21}{-32} \\t=9$

Answer:

D. $0 = -16t^2 + 138t + 55; 9 s$

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3 years ago