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mr_godi [17]
3 years ago
10

kayla is making a scale drawing of a room in a house. The room actually measures 30 feet by 45 feet. Using the scale 1 in: 15 ft

, what are the dimensions of the room in her drawing?
Mathematics
1 answer:
dem82 [27]3 years ago
6 0

Answer:

2 by 3 inches

Step-by-step explanation:

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the Wall Street Journal reported that automobile crashes cost United States $162 billion annually. The average cost per person f
Tanya [424]

Answer:

a) Margin of error = 166.311

b) sample size ≥ 62

Step-by-step explanation:

Given:

Average cost = $1599

Sample size = 50 persons

Standard deviation = $600

Confidence level is 95%

a) Margin of error = z\frac{\sigma}{\sqrt{n}}

Now for confidence level of 95% z-value = 1.96

Thus,

Margin of error = 1.96\frac{600}{\sqrt{50}}

or

Margin of error = 166.311

b) For Margin of error ≤ 150

z\frac{\sigma}{\sqrt{n}} ≤ 150

or

1.96\frac{600}{\sqrt{n}} ≤ 150

or

1.96\frac{600}{150} ≤ √n

or

√n ≥ 7.84

or

n ≥ 61.4656

Therefore,

sample size ≥ 62

6 0
3 years ago
Please help!!!! the question is in screenshot
andreev551 [17]

Answer:

-\cos nw_0t

Step-by-step explanation:

We can use the double angle identity for sine.

\sin (A+B)=\sin A \cos B+\sin B\cos A

The given expresion is

\sin (nw_0t-90)

We apply the identity to get:

\sin (nw_0t-90)=\sin nw_0t \cos 90-\cos nw_0t \sin 90

We simplify to obtain;

\sin (nw_0t-90)=\sin nw_0t (0)-\cos nw_0t (1)

This simplifies to:

\sin (nw_0t-90)=-\cos nw_0t The correct answer is D

8 0
3 years ago
Let f (x) = 10 x^10 – 5x^8 +2x^6
swat32
This question is way to hard
8 0
3 years ago
An animal shelter has 36 pets available for adoption. ¼ of them are puppies. How many are puppies?
icang [17]

Answer:

9.

Step-by-step explanation:

36 * 1/4

= 36/4

=9.

8 0
3 years ago
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Need help ASSAP WILL GET brainliest 4t minus 2 = 14
Masteriza [31]
Answer: t=4
Explanation: 4t-2=14
4t=16
4 0
3 years ago
Read 2 more answers
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