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3 years ago

A fair coin is tossed four times. what is the probability that the sequence of tosses is hhtt?

1 answer:

3 0

The probability of obtaining a head is 1/2.
The probability of obtaining a tail is 1/2.

The 4 tosses are independent events.
Therefore the probability of obtaining hhtt is
(1/2)⁴ = 1/16

Answer: 1/16

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Alex the electrician needs 34 yards of electrical wire to complete his job. He has a coil of wiring in his workshop. The coiled

bogdanovich [222]

Answer: This coil will not be enough to complete the job.

Step-by-step explanation:

The circumference of the coil of wiring can be calculated with:

$C=2\pi r$

Where r is the radius and $\pi=3.14$

The radius can be calculated by dividing the diameter by 2. Then:

$r=\frac{18in}{2}\\\\r=9in$

Convert 9 inches to yards (1 yard=36 inches):

$(9in)(\frac{1yd}{36in})=0.25yd$

Substitute this radius into the formula:

$C=2(3.14)(0.25yd)\\C=1.57yd$

Since there are 21 circles of wire, you need to multiply $C=1.57yd$ by 21:

$C_T=(1.57yd)(21)=32.97yd$

The coil has 32.97 yards of wire and Alex needs 34 yards, therefore, this coil will not be enough to complete the job.

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3 years ago

Simplify (-7÷8)(-3÷4)

Nastasia [14]

Exact from: 21/32
Decimal form: 0.65625

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3 years ago

Read 2 more answers

Can someone solve this problem and explain to me how you got it

Lady_Fox [76]

Answer:

i do not know i am in 7th grade

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3 years ago

Which table represents only values described by the relationship between t and w?

Kay [80]

Answer:

My thinking it will be c

Step-by-step explanation:

C look like it right to me i ask my math teacher he said it was right

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2 years ago

What is the solution to the equation 4(x – 3) - 8 = 16?

krek1111 [17]

Answer:

4x-12-8=16

4x=16+8+12

4x=36

x=9

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3 years ago