3 years ago

Help I don't understand

Mathematics

1 answer:

Leona [35]3 years ago

8 0

150 student voted for later start.

You might be interested in

What is the quotient of<br> 3/4 and 1/5

garri49 [273]

Answer:

3.75

Step-by-step explanation:

5 0

2 years ago

If x+ 1=23 what is the value of 3x +3?

blagie [28]

$\bf x+1=23\qquad \qquad \stackrel{3(x+1)}{3x+3}\qquad \qquad \stackrel{\downarrow }{3}(x+1)=\stackrel{\downarrow }{3}(23)$

8 0

3 years ago

The shaded portion of the model represents the decimal 0.43. Which decimal completes the statement to make it true? ___ > 0.4

ivolga24 [154]

The answer is 0.56

Hope it helps!

4 0

3 years ago

In a dog show , there will be a gold and a silver medal awarded. There are 5 finalist. In how many different ways can the 2 meda

harina [27]

P(5,2) = 5!/3! = 20

in 20 ways you can give medals

6 0

3 years ago

The weekly earnings of students in one age group are normally distributed with a standard deviation of 47 dollars. A researcher

ELEN [110]

Answer:

Option D) 340

Step-by-step explanation:

We are given the following in the question:

Alpha, α = 0.05

Population standard deviation, σ = $47

Margin of error = 5

95% Confidence Interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

$\text{Margin of error} = z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$5 = 1.96(\dfrac{47}{\sqrt{n}} )\\\\\sqrt{n} = \dfrac{47\times 1.96}{5}\\\\n = 339.443776\\\Rightarrow n \approx 340$

Thus, the correct answer is

Option D) 340

7 0

3 years ago