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1 year ago

14

a) If side a measures 90 feet and side b measures 120 feet, how many feet of flowers will be planted along side c, the hypotenus

e of the triangle? Show your work and explain your reasoning

1 answer:

PilotLPTM [1.2K]1 year ago

3 0

That is true good job dude keep up the good work

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The paired data below consist of the temperatures on randomly chosen days and the amount a certain kind of plant grew (in millim

rjkz [21]

Answer:

Step-by-step explanation:

Given is a paired data which consist of temperatures (X in mm) and growth

We have to find the linear correlation i.e. the measure of association between these two variables.

x y xy x^2 y^2

62 36 2232 3844 1296

76 39 2964 5776 1521

50 50 2500 2500 2500

51 13 663 2601 169

71 33 2343 5041 1089

46 33 1518 2116 1089

51 17 867 2601 289

44 6 264 1936 36

79 16 1264 6241 256

Mean 58.88888889 27 1623.888889 3628.444444 916.1111111

cov 33.88888889

std dev x 13.43916333 14.50861813

sx *sy

r 0.195529176

Hence we find that correlation coefficient 0.1955.

7 0

2 years ago

Lori bought a shirt and a hat at a half off sale. If she spent a total of $21 on the two items, what was the original price of t

Bad White [126]

Do 21 divided by 2 and you’ll get 10.5 so the original price was $10 and 50 cents

6 0

1 year ago

Each year a town holds a winter carnival this year 40% of the attendees were children under the age of 10 if 304 children under

tatuchka [14]

Answer:

760 attendees

Step-by-step explanation:

40% of the attendees is 304. That means you can add 304 to 304 (304 x 2) to get 608. To get the last 20%, divide 304 by 2, because 40(%) divided by 2 is 20(%). The answer to that is 152. Now, add it all up. 608 + 152 = 760.

In conclusion, there were 760 attendees at the carnival.

4 0

1 year ago

2 cities have nearly the same north-south line 90° W. The latitude of the first city is 23°N, the latitude of the second city is

Ivan

Answer:

The cities are approximately 1452 km apart

Step-by-step explanation:

The two cities are on the same Longitude 90°W therefore the distance between them is on a great circle

Latitude of the first city = 23°N

Latitude of the second city = 36° N

Because their latitude are on the same polar axis, we subtract to get the angular difference

Angular Difference = 36 -23 =13°

$Distance= \frac{\alpha}{360} X 2\pi R$

where $\alpha = Angular Difference, R= radius of the earth$

$Distance= \frac{13}{360} X 2\pi X 6400=1452.11km$

The cities are approximately 1452 km apart

4 0

1 year ago

Alice wants to estimate the percentage of people who plan on voting yes for the upcoming school levy. She surveys 380 individual

goblinko [34]

Answer: (0.641, 0.719)

Step-by-step explanation:

The confidence interval for population proportion is given by :-

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

Given : Level of significance : $1-\alpha:0.90$

Then , significance level : $\alpha: 1-0.90=0.10$

Since , sample size : $n=380$ , i.e. a large sample.

Critical value : $z_{\alpha/2}=1.645$

Also, the proportion of individuals plan on voting yes :-

$\hat{p}=\dfrac{260}{380}\approx0.68$

Then , the confidence interval at the 90% confidence level will be :-

$0.68\pm(1.645)\sqrt{\dfrac{0.68(1-0.68)}{380}}\\\\\approx0.68\pm0.039\\\\=(0.68-0.039, 0.68+0.039=(0.641,\ 0.719)$

Hence, the confidence interval at the 90% confidence level= (0.641, 0.719)

3 0

1 year ago