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Vaselesa [24]
2 years ago
11

Find the percent of change from 24°F to 39°F. Then state whether the percent of change is an increase or a decrease.

Mathematics
1 answer:
lara31 [8.8K]2 years ago
4 0

Answer:

24F is a increase I belive and 39F is a decrease

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A software engineer is creating a new computer software program. She wants to make sure that the crash rate is extremely low so
Soloha48 [4]

Answer:

a) the sample size is 400

b) 95% confidence Interval for p is ( 0.0286, 0.0714 )

Step-by-step explanation:

Given the data in the question;

sample size n = 400

x = 20

p = x / n = 20 / 400 = 0.05

q = 1 - p = 1 - 0.05 = 0.95

a)

n = 400

Hence, the sample size is 400

b) 95% confidence Interval for p;

At 95% confidence interval,

significance level ∝ = 1 - 95% = 1 - 0.95 = 0.05

∝/2 = 0.05 / 2 = 0.025

so, Z critical Value ; Z_{\alpha /2 = 1.96  { from table }

So for Confidence Interval for p;

⇒ p' ± Z_{\alpha /2√( p'q' / n )

we substitute

⇒ 0.05 ± 1.96√( (0.05 × 0.95 ) / 400 )

⇒ 0.05 ± 1.96√( 0.00011875 )

⇒ 0.05 ± 1.96 × 0.010897

⇒ 0.05 ± 0.021358

⇒ ( 0.05 - 0.021358 ), ( 0.05 + 0.021358 )

⇒ ( 0.0286, 0.0714 )

Therefore, 95% confidence Interval for p is ( 0.0286, 0.0714 )

8 0
2 years ago
An equilateral triangle has a perimeter of
Allushta [10]

Answer:

4y + 3

Step-by-step explanation:

An equilateral triangle has three sides of equal length.

The length of each side is 1/3 of the perimeter.

(12y + 9)/3 = 12y/3 + 9/3 = 4y + 3

Answer: 4y + 3

6 0
2 years ago
Evaluate<br> + pq when p = 8 and q = 6.
Veronika [31]

Answer:

48

Step-by-step explanation:

pq

substitute values

(8)(6)

8*6 = 48

6 0
2 years ago
P= -4b^2+6b-9<br> Q= 7b^2-2b-5<br> P-Q=
insens350 [35]

Answer:

P - Q = - 11b² + 8b - 4

Step-by-step explanation:

P - Q

= - 4b² + 6b - 9 - (7b² - 2b - 5) ← distribute parenthesis by - 1

= - 4b² + 6b - 9 - 7b² + 2b + 5 ← collect like terms

= - 11b² + 8b - 4

5 0
3 years ago
What’s 5 4/9 as an improper fraction
strojnjashka [21]

Answer: 49/9

Step-by-step explanation:

9x5=45

45+4=49

8 0
2 years ago
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