MATHEMATICS COLLEGE

John has $12. Tony has twice as much as John. Eric has $4 less than Tony. How much money does Eric have?

Answers

Answer 1

Answer:

Answer:

$20

Step-by-step explanation:

John=$12

Tony=$24

Eric=$20

multiply 12 by 2 to get Tony's money then subtract 4 for eric's money

Answer 2

Answer:

Answer:

Step-by-step

Tony : 24

Eric : 24 - 4

Answer : 20

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in a certain city it was recorded at 16th and 2/7 inches of rain fell over 24 hour. How much rain fell per hour on average

Answers

0.0119047619 or 1/84 inches of rain/ hour. You divided 2/7 by 24 to get this answer.

People who eat lots of fruits and vegetables have lower rates of colon cancer than those who eat little of these foods. Fruits and vegetables are rich in "antioxidants" such as vitamins A, C, and E. Will taking antioxidants help prevent colon cancer? A medical experiment studied this question with 864 people who were at risk of colon cancer. The subjects were divided into four groups: daily beta-carotene, daily vitamins C and E, all three vitamins every day, or daily placebo. After four years, the researchers were surprised to find no significant difference in colon cancer among the groups(a) What are the explanatory and response variables in this experiment?(b) Outline the design of the experiment. Use your judgment in choosing the group sizes.(c) The study was double-blind. What does this mean?(d) What does "no significant difference" mean in describing the outcome of the study?(e) Suggest some lurking variables that could explain why people who eat lots of fruits and vegetables have lower rates of colon cancer. The experiment suggests that these variables, rather than the antioxidants, may be responsible for the observed benefits of fruits and vegetables.

Answers

Answer:

Step-by-step explanation:

(a). The explanatory variables are the antioxidant group, the response variable is the result of the rate of colon cancer

(b)The design of the experiment is stratified Random sampling. I'll suggest there divided into equal group of 216 each.

(c). Double blind is when the people subjected to the experiment are not in the know if they're given placebo or the real antioxidant

(d) No significant difference mean, there is no convincing relationship that those that engage in using antioxidant have reduced colon cancer rate.

(e) Awareness of its history in family, age also.

Four family members compared their ages. Terell is 3 years younger than Danny. Danny is 1 year younger than Pablo. Pablo's age is 1/3 Shaniqua's age. How old is Terell if Shaniqua is 36 years old?The picture below is wrong so don't say this you little l=UCK.

Answers

Answer:

8 years

Step-by-step explanation:

Shaniquas age is given as 36. This age is going to help us to find the rest.

Pablo is said to 1/3 of Shaniquas age

= 1/3 of 36 = 36/3 = 12

Pablo is 12

Danny is younger than pablo by 1

12 - 1 = 11

Danny is 11

Terrell is younger than danny by 3

11-3 = 8

Terrell is 8 years old

Answer:

I think ur profile pic is cute

Step-by-step explanation:

A survey among students at a certain university revealed that the number of hours spent studying the week before final exams was approximately normally distributed with mean 25 and standard deviation 6. What proportion of students studied between 25 and 34 hours

Answers

Answer:

$P(25<X<34)=P((25-\mu)/(\sigma)<(X-\mu)/(\sigma)<(34-\mu)/(\sigma))=P((25-25)/(6)<Z<(34-25)/(6))=P(0<z<1.5)$

And we can find this probability with this difference:

$P(0<z<1.5)=P(z<1.5)-P(z<0)$

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(0<z<1.5)=P(z<1.5)-P(z<0)=0.933-0.5=0.433$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem'

Let X the random variable that represent the hous spent studying the week before final exams of a population, and for this case we know the distribution for X is given by:

$X \sim N(25,6)$

Where $\mu=25$ and $\sigma=6$

We are interested on this probability

$P(25<X<34)$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=(x-\mu)/(\sigma)$

If we apply this formula to our probability we got this:

$P(25<X<34)=P((25-\mu)/(\sigma)<(X-\mu)/(\sigma)<(34-\mu)/(\sigma))=P((25-25)/(6)<Z<(34-25)/(6))=P(0<z<1.5)$

And we can find this probability with this difference:

$P(0<z<1.5)=P(z<1.5)-P(z<0)$

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(0<z<1.5)=P(z<1.5)-P(z<0)=0.933-0.5=0.433$

What is the volume of a rectangular prism with a height of 6 m, a length of 4 m, and a width of 2 m?28 m3
38 m3
44 m3
48 m3

Answers

Answer:

48m

Step-by-step explanation:

Formula: lwh

4*2*6=48m

Answer:

Step-by-step explanation:

Simplify 3(2x + y) using the distributive property.

Answers

The simplification of the expression 3(2x + y is 6x +3y

What is distributive property?

According to the distributive property, multiplying the sum of two or more addends by a number will give the same result as multiplying each addend individually by the number and then adding the products together.

For example, a ( x +y) can be written in the form

ax + ay .

Similarly, simplifying 3(2x +y) using distributiveproperty means

3× 2x + 3 × y

= 6x + 3y

Therefore the simplification of the expression 3(2x + y) is 6x + 3y.

learn more about distributive property from

brainly.com/question/2807928

#SPJ3

Answer:

the solution is just 6x+3y

thats all