All categories

3 years ago

GET A fREE 99 points! First to answer gets it!

Mathematics

2 answers:

spayn [35]3 years ago

7 0

Answer:

Step-by-step explanation:

Hello, how' life dude?

Snowcat [4.5K]3 years ago

3 0

Answer:

i'm teh second :D

Step-by-step explanation:

You might be interested in

Please help math graphs

Hoochie [10]

what you put is right

6 0

3 years ago

Efficiency is the ratio of output work to input work, expressed as a percentage. Light bulbs put out less light energy than the

grandymaker [24]

Answer:

10%

Step-by-step explanation:

Using the given formula with the given data, we have ...

efficiency = output work / input work

= (10 J)/(100 J) = 0.10 = 10%

7 0

3 years ago

A hot air balloon is cruising at an altitude of 120 meters above the ground when it begins its descent. The balloon descends at

Gekata [30.6K]

Answer:

120 - 4.5t= 75

t = 10 minutes

Step-by-step explanation:

the equation :

120 - 4.5t= 75

the solution:

-4.5 t = 75-120

-4.5t = -45

t = -45/(-4.5) = 10 minutes

4 0

2 years ago

A random sample of 70 printers discovered that 25 of them were being used in small businesses. find the 95% limit for the popula

kvasek [131]

Answer:

The sample proportion of printers used in small business is:

$\hat{p}=\frac{25}{70}=0.3571$

The 95% confidence interval for the population proportion of printers that are used in small businesses is:

$\hat{p} \pm z_{\frac{0.05}{2}} \sqrt{\frac{\hat{p}(1-\hat{p})}{n} }$

Where:

$z_{\frac{0.05}{2}}=1.96$ is the critical value at 0.05 significance level

$\therefore 0.3571 \pm 1.96 \sqrt{\frac{0.3571(1-0.3571)}{70} }$

$0.3571 \pm 0.1122$

$\left ( 0.3571 - 0.1122, 0.3571 + 0.1122 \right)$

$\left(0.245,0.469 \right)$

Therefore, the 95% confidence interval for the population proportion of printers that are used in small businesses is (0.245 , 0.469)

7 0

3 years ago

Is the relationship between 7s in 7,742 ant the 7s in 7,785 different in anyway? Explain

melisa1 [442]

The relationship between the 7's is not different in any way because the sevens are all in the same place. The sevens are in the hundreds and thousands place.

4 0

3 years ago