2 years ago

Suppose that 22 inches of wire costs 88 cents.

Mathematics

1 answer:

Gennadij [26K]2 years ago

5 0

.88/22=.04
41X.04=1.64

You might be interested in

You spend $40 on 5 Pounds of concreate what is the<br> 1 unit rate in dollars

Umnica [9.8K]

Answer:

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

The sum of Juanita’s age and Sara’s age is 33 years. If Sara is 15, how old is Juanita?

astraxan [27]

Juanita is 18 years old.
33-15
18

Hope this helps

4 0

3 years ago

Read 2 more answers

A sidewalk around a circular park covers a distance of 65 meters. A new sidewalk is being constructed across the park through it

lidiya [134]

All we have to do is divide the distance of the old sidewalk by 3.14:

65 / 3.14 ≈ 20.7006

That means that, rounded to the nearest meter, the new sidewalk is:

21 meters long!

8 0

3 years ago

Read 2 more answers

(4x5 + 9x3 - 12x8) + (8x3 - 7x + 2x5)

SSSSS [86.1K]

Answer:

-10x5 + 8x4 - 7x3 - 20x2 - x + 18

Step-by-step explanation:

8 0

2 years ago

In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2455 subjects randomly select

Genrish500 [490]

Answer: 0.355,0.405)

Step-by-step explanation:

Given : Significance level : $\alpha=1-0.99=0.01$

Number of subjects (n) = 2455

Number of surveys returned = 931

The probability of surveys get return will be :-

$p=\dfrac{931}{2455}=0.379226069246\approx0.38$

The confidence interval for proportion is given by :-

$p\pm z_{\alpha/2}\times\sqrt{\dfrac{p(1-p)}{n}}$

$0.38\pm z_{0.005}\times\sqrt{\dfrac{0.38(1-0.38)}{2455}}\\\\=0.38\pm(2.576)0.0098\\\approx0.38\pm0.025=(0.355,0.405)$

Hence, the 99% confidence interval for the proportion of returned surveys : (0.355,0.405)

5 0

3 years ago