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tangare [24]
3 years ago
8

1. Sameera planned a rectangular walkway to be 25 ft long. She decides to change the walkway to be 45 ft long. What is the chang

e in the scale factor?
1 to 9
1 to 5
5 to 9
9 to 5
------------------------------------------------------------------------------------------------------------------
2. The list below shows all of the possible outcomes for flipping four coins.

HHHH
HHHT
HHTH
HHTT
HTHH
HTHT
HTTH
HTTT
THHH
THHT
THTH
THTT
TTHH
TTHT
TTTH
TTTT
What is the probability of getting the same number of heads and tails?
1/8
1/4
3/8
3/4
------------------------------------------------------------------------------------------------------------------
3.What is the difference of –96.43 – (–98.67)?
–195.1
–2.24
2.24
195.1
------------------------------------------------------------------------------------------------------------------
4.Yuuma applied the steps below to find the product of (–10.2)(–16.4).

Step 1: (–10.2)(–16.4) = (–16.4)(–10.2)
Step 2: = (–16.4)(–10) + (–16.4)(–0.2)
Step 3: = ____________
Step 4: = 167.28

Which expression correctly fills in the blank in Step 3?
(–164) + (–3.28)
164 – 3.28
(–164) + 3.28
164 + 3.28
------------------------------------------------------------------------------------------------------------------
Answer ASAP!!!!!!!!!
Mathematics
2 answers:
sukhopar [10]3 years ago
7 0
1. i think 5 to 9
2. i think 3/8
3. 2.24
4. 164+3.28
hope this helps!
frutty [35]3 years ago
7 0

Answer:

1. The correct option is 3.

2.The correct option is 3.

3.The correct option is 3.

4.The correct option is 4.

Step-by-step explanation:

1.

Sameera planned a rectangular walkway to be 25 ft long. She decides to change the walkway to be 45 ft long.

The scale factor is

k=\frac{\text{Initial length}}{\text{New length}}

k=\frac{45}{25}

k=\frac{9}{5}

The scale factor is 9/5, it means the change in the scale factor is 5 to 9.

Therefore the correct option is 3.

2.

Total possible outcomes for flipping four coins are

S = {HHHH, HHHT, HHTH, HHTT, HTHH, HTHT, HTTH, HTTT, THHH, THHT, THTH, THTT, TTHH, TTHT, TTTH, TTTT}

n(S)=16

Possibilities of getting the same number of heads and tails.

A = {HHTT, HTHT, HTTH, THHT, THTH, TTHH} = 6

n(A)=6

The probability of getting the same number of heads and tails is

P=\frac{n(A)}{n(S)}

P=\frac{6}{16}=\frac{3}{8}

Therefore the correct option is 3.

3.

The given expression is

-96.43-(-98.67)

-96.43+98.67

2.24

Therefore the correct option is 3.

4.

The given expression is

(-10.2)(-16.4)

Step 1: (–10.2)(–16.4) = (–16.4)(–10.2)

Step 2: = (–16.4)(–10) + (–16.4)(–0.2)

Step 3: = 164 + 3.28

Step 4: = 167.28

Therefore the correct option is 4.

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

For this case we know that we have a sample of n = 500 students and we have a percentage of expected return for their sophomore years given 66% and on fraction would be 0.66 and we are interested on the distribution for the population proportion p.

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1) Randomization: We assume that we have a random sample of students

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On this case in order to check if the random variable X follows a normal distribution we can use the empirical rule that states the following:

• The probability of obtain values within one deviation from the mean is 0.68

• The probability of obtain values within two deviation's from the mean is 0.95

• The probability of obtain values within three deviation's from the mean is 0.997

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