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3 years ago

A student flips a coin four times. What is the probability the coin lands tails up exactly three times?

Mathematics

1 answer:

Liula [17]3 years ago

5 0

Answer:

0.25

Step-by-step explanation:

Use binomial probability:

P = nCr pʳ qⁿ⁻ʳ

where n is the number of trials,

r is the number of successes,

p is the probability of success,

and q is the probability of failure (1−p).

P = ₄C₃ (0.5)³ (1−0.5)⁴⁻³

P = 4 (0.5)³ (0.5)

P = 0.25

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How do you break apart the factor 42 using place value?

worty [1.4K]

Hey there!☺

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Place Value starting from Thousands

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3 years ago

If the wall is 8.5 feet tall and 12.5 wide, how much wallpaper should you buy?

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Answer:

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3 years ago

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Answer:

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Step-by-step explanation:

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<em>kiniwih426</em>

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3 years ago

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HELP! PLEASE! Jackson is building a small rectangular basketball section in his backyard. The length of the section will be 1.25

Misha Larkins [42]

Answer:

Part A) $A=1.25W^2$

Part B) Length: 17.5 feet and Width: 14 feet

Step-by-step explanation:

Part A) Create an equation to represent the area of the basketball section A, in terms of the width W.

Let

L ----> the length of the rectangular basketball section

W ---> the width of the rectangular basketball section

we know that

The area of the rectangular basketball section is equal to

$A=LW$ ----> equation A

The length of the section will be 1.25 times the width of the section

$L=1.25W$ ----> equation B

substitute equation B in equation A

$A=(1.25W)W\\A=1.25W^2$

Part B) Jackson decides to make the area of the basketball section 245 square feet. What are the dimensions, in feet, of the basketball section?

we have

$A=1.25W^2\\A=245\ ft^2$

$245=1.25W^2$

solve for W

$W^2=245/1.25\\W^2=196\\W=14\ ft$

Find the value of L

substitute the value of W in the equation B

$L=1.25(14)=17.5\ ft$

therefore

The dimensions are :

Length: 17.5 feet

Width: 14 feet

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3 years ago