3 years ago

Are these ratios equivalent? 2:4 and 6:16

Mathematics

2 answers:

Grace [21]3 years ago

4 0

Answer:

Step-by-step explanation:

2:4 is 1:2, 6:16 is not one half

adelina 88 [10]3 years ago

3 0

Answer:

Step-by-step explanation:

4/2=2

16/6=2.666666667

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In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minutes with a standard deviation

Rainbow [258]

Answer: C. $(29,\ 37.8)$

Step-by-step explanation:

The confidence interval for difference of two population mean is given by :-

$\overline{x}_1-\overline{x}_2\pm z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}$

Given : Level of significance : $1-\alpha:0.99$

Then , significance level : $\alpha: 1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=2.576$

$n_1=30\ ;\ n_2=50\\\\\overline{x}_1=46.7\ ;\ \overline{x}_2=13.3\\\\s_1=9.2\ ;\ s_2=1.9$

$46.7-13.3\pm(2.576)\sqrt{\dfrac{9.2^2}{30}+\dfrac{1.9^2}{50}}\approx33.4\pm4.38=(29.02\ ,37.78)\approx(29,\ 37.8)$

Hence, a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides $(29,\ 37.8)$

5 0

3 years ago

The MoviePlex theater sold 1,456 tickets. The theater sold 6 times as many regular price tickets as it sold discount tickets. Ma

Lady bird [3.3K]

Jonah is the one that is correct because 1/6th of 1248 is 208. Then you add 1248 and 208 which is 1456 which is the correct answers

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3 years ago

Rafael counted a total of 40 white cars and yellow cars. There were nine times as many white cars as yellow cars.How many white

Alex777 [14]

You said there were 40 yellow carsso 40×9 is 360

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3 years ago

how many pounds of rock will you need to fill an area 25 ft by 35 ft to a depth of 2 in. If the rock weighs 1050 lb cubic yard?

Eduardwww [97]

The volume of the area is Length x width x height:

25 x 35 x 2/12 = 145.83 cubic feet.

1 cubic foot = 0.037 cubic yards:

145.83 x 0.037 = 5.40 cubic yards.

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Note:

Rounding and conversion may change the answer slightly, but I believe I rounded everything as it should be.

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3 years ago

HELP ME PLS<br> Write the ratio<br> 3/8 with a numerator of 9.

Anna35 [415]

Answer:

Step-by-step explanation:

3 9

9 times 8

divided by 3 = denominator

9x8÷3=24

7 0

3 years ago

Read 2 more answers