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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?

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