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1. Going by the answer...this helps.

(A): The sum of the series is 2/4+3/4+..8/4, and this is incorrect. 

(B): We have 4^0+4^1+...4^7, and this is also incorrect.

(C): The sum of the series is 1+1/4+...+1/4096, and this works!

(D): Try it, it doesn't even match: 3/4+...etc.

Thus, the answer is (C). 

Try the second question on your own, and ask for any help if needed.

1, Sigma Notation: Sum of the series.

We will plug j=1, j=2, all the way up till j=5.

Thus, we have 2(1)+2(2)+2(3)+2(4)+2(5)=30.

Use the same steps for the rest...ask for help if you need some.

14?  Idk

Thanks!

Thank you for answering EP! I will say thank you for her bc we all know she won't...

https://web2.0calc.com/questions/stat-question-for-study-guide#r1

Agree with Tertre....

5a^2-22a - 15 = 0

Use Quadratic Formula   (as Tertre posted)   a = 5   b = -22   c = -15     to find the possible values of 'a' in the equation

You want to draw a diagram first...see Omi67's diagram.

Next...use the area of the trapezoid formula to find the height, which is 1/2(30h)=180, h=12.

Extend both sides to create a 5-12-13  triangle, and the length of each of the legs is 13 centimeters.

Agreed with Omi67 !

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\), so you can find the values !

what do you mean by Quadratic Formula

so it will be 1 ok thank you.

20 socks total      1st sock white      10 out of 20    

    now there is only 19 socks  left (9 of which are white)       so   second sock white is   9 out of 19

10/20  x   9/19   =  90 / 380 = 9/38

https://snag.gy/VWJRUM.jpg

If that is the side lengths of a rectangular prism ( a cube)      l x w x h = 1 x 1 x 1 = 1 cubic unit.

I see a diagram....but no question.     A' is A translated across the y-axis.

Distance between the two points is given by the distance formula

(2a-4)^2  +  ((a-4)--1)^2

4a^2 -16a+16    +  a^2-6a +9  = (2 sqrt10)^2

5 a^2 -22a + 25 = 40

5a^2-22a - 15 = 0

a = 5 or -3/5        (by Quadratic Formula)

5 * -3/5 =    -3

is that right or wrong. 

1+1+1=3/2=1.5

abc all =1 can this happen how do i find the volume. 

What are you talking about , siem?    A triangle can have side a and side b and side c = 1