All categories

2 years ago

What exactly is 30% of 40

Mathematics

2 answers:

Setler [38]2 years ago

7 0

12 . 10% = 4 -> 4*3= 12

Alexxandr [17]2 years ago

3 0

Answer: 12

Work: I just multiplied 40 by .30, and after that multiplication, you get 30% of 40. After doing that multiplication, you get 12.

<em>I hope this helps, and Happy Holidays! :)</em>

You might be interested in

Portia bought 12 bushes and 30 flowers for $240 to plant in her yard. Later, she realized she did not have enough plants and bou

Anni [7]

Answer: the cost of each bush is $15

the cost of each flower is $2

Step-by-step explanation:

Let x represent the cost of each bush.

Let y represent the cost of each flower.

Portia bought 12 bushes and 30 flowers for $240 to plant in her yard. This is expressed as

12x + 30y = 240- - - - - - - - - - -1

Later, she realized she did not have enough plants and bought 7 more bushes and 10 more flowers for $125. This is expressed as

7x + 10y = 125- - - - - - - - - - -2

Multiplying equation 1 by 7 and equation 2 by 12, it becomes

84x + 210y = 1680

84x + 120y = 1500

Subtracting, it becomes

90y = 180

y = 180/90

y = 2

Substituting y = 2 into equation 1, it becomes

12x + 30 × 2 = 240

12x + 60 = 240

12x = 240 - 60 = 180

x = 180/12

x = 15

8 0

3 years ago

Perform the following food service calculation.

Paul [167]

Answer:C

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

The population of a town 4000 and is decreasing by the rate of 5% per year. Estimate the population of the town after 3 years.

trapecia [35]

.05*3= .15

4000*.15= 600 So 600 people left the town

Now subtract

4000-600= 3400

4 0

2 years ago

Read 2 more answers

Monkey chunk cereal is normally $3.25 per box but today it is on sale for 25% what is the new price round to the nearest penny

ANEK [815]

Is it meaning the cereal is 25% off? If so then your answer would be $2.44

6 0

2 years ago

It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 122 feet. A transportat

madreJ [45]

Complete Question

The complete question is shown on the first uploaded image

Answer:

the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

The test statistics is $t = - 1.761$

The p-value is $p = P(Z < t ) = 0.039119$

$p \ge 0.01$

Step-by-step explanation:

From the question we are told that

The population mean is $\mu = 122$

The sample size is n= 38

The sample mean is $\= x = 116 \ feet$

The standard deviation is $\sigma = 21$

Generally the null hypothesis is $H_o : \mu = 122$

the alternative hypothesis is $H_a : \mu \ne 122$

Generally the test statistics is mathematically evaluated as

$t = \frac { \= x - \mu }{\frac{ \sigma }{ \sqrt{n} } }$

substituting values

$t = \frac { 116 - 122 }{\frac{ 21 }{ \sqrt{ 38} } }$

$t = - 1.761$

The p-value is mathematically represented as

$p = P(Z < t )$

From the z- table

$p = P(Z < t ) = 0.039119$

$p \ge 0.01$

4 0

2 years ago