All categories

3 years ago

Increase 80 in the ratio of 3:2

Mathematics

1 answer:

Karolina [17]3 years ago

6 0

Answer:

Ratios describe proportions. We can always multiply across ratios, or divide across them (as long as we do it to all of them). For example, the ratio 3 : 2 is the same as 6 : 4 and 300 : 200. Accuracy Tip.

Step-by-step explanation:

You might be interested in

How do i get a better grade if i'm failing

stellarik [79]

Ask for extra credit.

4 0

3 years ago

Read 2 more answers

Jane was paid $316 for 40 hours of work. Use compatible numbers to find about how much

Vinvika [58]

Answer:

$7.9 /hour

Step-by-step explanation:

$316/40 = $7. 9per hour

4 0

3 years ago

(04.01)The Baldwin family walked 4/5 of a mile in 4/9 of an hour. What is their unit rate in miles per hour?

sertanlavr [38]

Hello!

Since we know how much they walked in 4/9 of an hour, we will divide 4/5 by 4/9 to get 4/9 to one.

$\frac{4}{5}$ ÷ $\frac{4}{9}$ = $\frac{36}{20} = \frac{9}{5}$

They went 1 4/5 mph or 1.8 mph.

I hope this helps!

7 0

3 years ago

Read 2 more answers

A study was conducted to measure the effectiveness of hypnotism in reducing pain. The measurements are centimeters on a pain sca

blondinia [14]

The confidence interval for mean of the "before-after" differences is $\fbox{(-0.4037,1.8037)}$

Further explanation:

Find the difference between the before pain and the after pain.

Difference = before-after

Kindly refer to the Table for the difference of between the before and after pain.

Sum of difference = $5.6$

Total number of observation = $8$

Mean of difference = $0.7$

Sample standard deviation $s$ = $1.3201$

Level of significance = $5\%$

Formula for confidence interval = $\left( \bar{X} \pm t_{n-1, \frac{\alpha}{2}\%} \frac{s}{\sqrt{n}} \right)$

confidence interval = $\left( 0.7 \pm t_{8-1, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)$

confidence interval = $\left( 0.7 \pm t_{7, \frac{5}{2}\%} \frac{1.3201}{\sqrt{8}} \right)$

From the t-table.

The value of $t_{7, \frac{5}{2}\%$ = $2.365$

Confidence interval = $( 0.7 \pm 2.365}\times \frac{1.3201}{\sqrt{8}}) \right)$

Confidence interval = $\left( 0.7 - 2.365}\times \0.4667,0.7 + 2.365}\times \0.4667) \right$

Confidence interval = $(0.7-1.1037,0.7+1.1037)$

Confidence interval = $\fbox{(-0.4037,1.8037)}$

The $95\%$ confidence interval tells us about that $95\%$ chances of the true mean or population mean lies in the interval.

Yes, the hypnotism appear to be effective in reducing pain as confidence interval include includes the positive deviation from the mean.

Learn More:

1. Learn more about equation of circle brainly.com/question/1506955

2. Learn more about line segments brainly.com/question/909890

Answer Details:

Grade: College Statistics

Subject: Mathematics

Chapter: Confidence Interval

Keywords:

Probability, Statistics, Speed dating, Females rating, Confidence interval, t-test, Level of significance , Normal distribution, Central Limit Theorem, t-table, Population mean, Sample mean, Standard deviation, Symmetric, Variance.

7 0

3 years ago

Read 2 more answers

An object moves along a coordinate axis so that its position at time t is given by s(t)=t3. Estimate its instantaneous velocity

Mademuasel [1]

If the position at time t is

s(t) = (1 m/s³) t ³

then the average velocity over t = 2 s and t = 2.001 s is

v (ave) = (s (2.001 s) - s (2 s)) / (2.001 s - 2 s)

v (ave) = ((1 m/s³) (2.001 s)³ - (1 m/s³) (2 s)³) / (2.001 s - 2 s)

v (ave) ≈ (8.01201 m - 8 m) / (0.001 s)

v (ave) ≈ 12.006 m/s

6 0

3 years ago

Increase 80 in the ratio of 3:2​

Increase 80 in the ratio of 3:2