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3 years ago

5

1. A sample is being chosen for a survey to find out how people feel about adding more stop signs near a school. Which group wou

ld be least biased?
A. voters
B. drivers
C. students
D. teachers

1 answer:

Anna71 [15]3 years ago

8 0

I think that it would be voters because they are asking the people if they should or not.

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In a Calculus class, there are 11 freshman and 15 sophomores; 5 of the sophomores are females,

KATRIN_1 [288]

Answer:

61.5%

Step-by-step explanation:

Let's find all the demographics first:

Sophomores in the class(total 15):

Female: 5

Male : 10

Freshmen in the class(total 11):

Female: 3

Male: 8

There are 11 freshmen(male and female) and 5 female sophomores. Thus, the probability of choosing one of these 16 people in a class of 26 is 16/26 or 61.5%.

4 0

3 years ago

Find a power series representation for the function. (Give your power series representation centered at x = 0.) f(x) = x/6x^2 +

timama [110]

Looks like your function is

$f(x)=\dfrac x{6x^2+1}$

Rewrite it as

$f(x)=\dfrac x{1-(-6x^2)}$

Recall that for $|x|$ , we have

$\dfrac1{1-x}=\displaystyle\sum_{n=0}^\infty x^n$

If we replace $x$ with $-6x^2$ , we get

$f(x)=\displaystyle x\sum_{n=0}^\infty\frac(-6x^2)^n=\sum_{n=0}^\infty (-6)^n x^{2n+1}$

By the ratio test, the series converges if

$\displaystyle\lim_{n\to\infty}\left|\frac{(-6)^{n+1} x^{2(n+1)+1}}{(-6)^n x^{2n+1}}\right|=6|x^2|\lim_{n\to\infty}1=6|x|^2$

Solving for $x$ gives the interval of convergence,

$|x|^2$

We can confirm that the interval is open by checking for convergence at the endpoints; we'd find that the resulting series diverge.

3 0

3 years ago

What is the answer of this questoin 2c-3b+6+7b-2b+11?

Katena32 [7]

Answer:

$2c+2b+17$

Step-by-step explanation:

-----------------------

Given:

$2c-3b+6+7b-2b+11$

---------->>>>

Collect like terms.

$2c+(-3b+7b-2b)+(6+11)$

---------->>>>

Simplify

$2c+2b+17$

------------------------

Hope this is helpful.

7 0

3 years ago

Read 2 more answers

Which expressions are solutions to the equation 3/4 multiplied by x =15?

olga nikolaevna [1]

Answer:

b and d

Step-by-step explanation:

4 0

3 years ago

What is the value of "x" in 16^2 = x

katovenus [111]

16^2 = 16 * 16 =256

x = 256

7 0

3 years ago