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3 years ago

PLEASE HELP I REALLY NEED IT NOW. I WILL MARK AS BRAINLIEST

Mathematics

1 answer:

kotykmax [81]3 years ago

6 0

Answer:

In Celcious, the temperature should be documented as C. 39.2 degrees.

Step-by-step explanation:

Here is the formula. I don't know if this will help but I'm trying.

Formula

(39.222°C × 9/5) + 32 = 102.6°F

;^)

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Choose the solution set

yulyashka [42]

Start with

$x-8 > -3$

Add 8 to both sides:

$x > 8-3 \iff x > 5$

4 0

3 years ago

Construct a 99% confidence interval for the population mean, mu. Assume the population has a normal distribution. A group of 1

Zarrin [17]

Answer:

99% confidence interval for the population mean is [19.891 , 24.909].

Step-by-step explanation:

We are given that a group of 19 randomly selected students has a mean age of 22.4 years with a standard deviation of 3.8 years.

Assuming the population has a normal distribution.

Firstly, the pivotal quantity for 99% confidence interval for the population mean is given by;

P.Q. = $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample mean age of selected students = 22.4 years

s = sample standard deviation = 3.8 years

n = sample of students = 19

$\mu$ = population mean

Here for constructing 99% confidence interval we have used t statistics because we don't know about population standard deviation.

So, 99% confidence interval for the population mean, $\mu$ is ;

P(-2.878 < $t_1_8$ < 2.878) = 0.99 {As the critical value of t at 18 degree of

freedom are -2.878 & 2.878 with P = 0.5%}

P(-2.878 < $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ < 2.878) = 0.99

P( $-2.878 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X - \mu}$ < $2.878 \times {\frac{s}{\sqrt{n} } }$ ) = 0.99

P( $\bar X -2.878 \times {\frac{s}{\sqrt{n} }$ < $\mu$ < $\bar X +2.878 \times {\frac{s}{\sqrt{n} }$ ) = 0.99

99% confidence interval for $\mu$ = [ $\bar X -2.878 \times {\frac{s}{\sqrt{n} }$ , $\bar X +2.878 \times {\frac{s}{\sqrt{n} }$ ]

= [ $22.4 -2.878 \times {\frac{3.8}{\sqrt{19} }$ , $22.4 +2.878 \times {\frac{3.8}{\sqrt{19} }$ ]

= [19.891 , 24.909]

Therefore, 99% confidence interval for the population mean is [19.891 , 24.909].

6 0

3 years ago

What is the degree of the polynomial below? 4x^3+3x^2+6x+5 A. 0 B. 3 C. 1 D. 2

alexira [117]

Answer:

B. 3

Step-by-step explanation:

The degree of this polynomial is based on the highest power on the exponents (if there is more than one variable, it is based on the sum)

The highest power is 3, so the degree is 3

6 0

2 years ago

Read 2 more answers

Chelsea completes 35 math problems in 7 min.

Andru [333]

Answer = 5 problems per minute

Because you do the number of problems divided by the minutes eg 35/7 = 5

3 0

3 years ago

Which of the following questions describes the equation = a/4 -20?

Gekata [30.6K]

1) Negative five -5 x 4 = -20 2) Negative eighty -80 / -4 = 20 3) Negative 1/5 (-1/5) x (-20) = 4 4) Negative eighty (-80) / 4 = -20

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2 years ago