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2 years ago

I WILL UPVOTE ALL

Mathematics

2 answers:

Damm [24]2 years ago

7 0

D.82% is the correct answer because 62/82 give .817 then you would round it off to percentage which would give you 81.7 = 82% (Confidenty this is correct)

stich3 [128]2 years ago

7 0

Answer:

The correct answer is D) 82%

Step-by-step explanation:

Consider the table shown below:

From the table we can find that 67 students are planing to attend the school.

The total number of students are 82.

Marginal relative frequency = Divide the total number of students who planing to attend the school by the total number of students.

$\text{Marginal relative frequency}=\frac{67}{82}\approx0.82$

Hence, the marginal relative frequency for students who plan to attend college is 0.82.

Therefore, the correct option is D) 82%

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) Would you rather receive $1,500 a year for 12 years, or $1,200 a year for 20 years if the interest rate is 7%?

Umnica [9.8K]

Answer:

$1200 should receive.

Step-by-step explanation:

To check whether to receive $1500 or $1200 just find the present values of each amount.

Present value of annuity $1500:

Present value of annuity = Annuity (P/A, 7%, 12)

Present value of annuity = 1500 (P/A, 7%, 12)

Present value of annuity = 1500 (7.9426)

Present value of annuity = $11913.9

Present value of annuity $1200:

Present value of annuity = Annuity (P/A, 7%, 20)

Present value of annuity = 1500 (P/A, 7%, 20)

Present value of annuity = 1500 (10.5940)

Present value of annuity = $15891

Thus, $1200 should receive.

6 0

3 years ago

A student reports that, of a simple random sample of 50 college u undergraduate students, 21 % were taking more than fifteen cre

algol13

Answer:

D) Both A and C are correct.

Step-by-step explanation:

If the sample contains 50 students, the percentage equivalent to each student is:

$P = \frac{100\%}{50}=2\%$

Each student corresponds to 2%, which means that percentages should be multiples of 2%.

21% is not a multiple of 2% and corresponds to:

$n = 0.21*50 = 10.5$

21% of 50 students is 10.5 students, and you cannot sample a fraction of a student.

Therefore, Both A and C are correct.

6 0

3 years ago

Use the grouping method to factor this polynomial x ^ 3 + 2x ^ 2 + 7x + 14

elena55 [62]

Answer:

B. ( $x^{2}$ +7)(x+2)

Step-by-step explanation:

The greates common factor between 7 and 14 is 7 so you know that one of the terms is going to be 7....but what times 7 equals 14...2

So we know that in one set of parentheses its going to be (something +2) and in another (something +7)

Well if we know that one is going to be 2, how do we go from 2 to 2 $x^{2}$ .....2 times $x^{2}$ equals $2x^{2}$

So now we know that one set of parentheses is going to be (something + 2) times ( $x^{2}$ +7)

So lastly, we have to find out how to get $x^{3}$ but since we already have a $x^{2}$ in the second set of parentheses all we have to do is put a x in the first set because x times $x^{2} = x^{3}$

Hope this helps!

6 0

3 years ago

In the past, 25% of the town residents participated in the school board elections. The town officials recently undertook an exte

Wewaii [24]

Answer:

1. $H_{0}$ :at most 25% of the town residents participate in the school board election

$H_{a}$ :more than 25% of the town residents participate in the school board election

2. $p_{0}$ = 0.25

Step-by-step explanation:

$p_{0}$ is choosen as the highest possible proportion probability according to the null hypothesis, which is 25%

7 0

2 years ago

R^2+3r+5-r^3/r is a quadratic/cubic/linear polynomial?

Sergeu [11.5K]

$r^2+3r+5-r^3/r$ is a linear polynomial

S<u>tep-by-step explanatio</u>n:

based on the highest power of the variables of a polynomial, it can be classified as linear,polynomial, quadratic polynomial,cubic polynomial etc.

In a linear polynomial, the highest power of the variable is 1. The general form of a linear polynomial is ax+b

In a quadratic polynomial, the highest power of the variables is 2.The general form of quadratic polynomial is $ax^2+bx+c$

In a cubic polynomial,the highest power of variable is 3.The general form of cubic polynomial is $ax^3+bx^2+cx+d$ .

Take the given question and simplify it

$r^2+3r+5-r^3/r=r^2+3r+5-r^2\\=3r+5$

It is of the form ax+b. Hence it is a linear polynomial.

3 0

3 years ago