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Since the probability for each one is defective is 0.05,

the probability for all three to be defective:  0.05 x 0.05 x 0.05  =  0.000 125

Since the probability that each one is not defective is 0.95, 

the probability for all three to not be defective:  0.95 x 0.95 x 0.95 = 0.857 375

because

Let's follow PEMDAS (Parenthases, Exponents, Multipication/Division, Addition/Subtraction).

-3.1/1.2(5.3)

We're reading this left to right, so we start by doing -3.1/1.2, which is approximately -2.583

-2.583(5.3)

Then, we multiply.

-2.583*5.3=-13.689

-3.1/1.2(5.3)= approximately -13.69

375*472,000,000,000=177,000,000,000,000

If you need to figure out these types of equations, just use the site's calculator by clicking the Home tab at the top of the page.

You cannot take the Log of a negative number. You enter your number as 4.2e-7 and take the Log of it, which in this case will a negative number. And if you wish to change the sign from + to - or vice versa, then you can do it AFTER you have taken the Log of your number.

And please explain this question for me 

So his answer is incorrect too right ? 

Simplify the following:
(x-2) (x+2)-x (x-1)

(x-2) (x+2) = (x) (x) + (x) (2) + (-2) (x) + (-2) (2) = x^2+2 x-2 x-4 = x^2-4:
x^2-4-x (x-1)

-x (x-1) = x-x^2:
x-x^2+x^2-4

Grouping like terms, x^2-x^2+x-4 = x-4+(x^2-x^2):
x-4+(x^2-x^2)

x^2-x^2 = 0:
Answer: |    x - 4
 

Use the formula: F=G.M.m/r^2, where G=Newton's constant, M=mass of 1st object, m=mass of the second object, r=distance between the two objects.

Since his average on the first 3 tests was 90.67%, therefore he earned:

.9067 X 450=408 points on first 3 tests. But, since he needs to get 93% of the total of 700 points, then we have:93% X 700=651 points he must obtain overall. Therefore, 651 - 408=243 points out of 250 points in the final that he must get: Therefore 243/250=97.2% he must get in the final.

You take the radius times the radius. Then you take the answer times pi.

(yes I know I'm back, don't act like its some breaking news lol)

Oh they're not making you upset

they're just teaching you the benefits of becoming a member, compared to being anonymous or guest

Let's go step by step.

3y=2y+1/8

First, subtract 2 y from each side of the equals sign.

3y-2y=1y, so th left side would become y, and 2y-2y=0, so the right side becomes 1/8. Putting it together gets us a new equation of...

y=1/8

4-7=-3

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Let me explain further.

Commas are often used just to seperate the different place values.

Ex.

10000000000000000

Tnis number is hard to read, right? It's difficult to tell what number it is.

However...

10,000,000,000,000,000

The commas divide up the zeros so you can count ones, thousands, millions, billions, trillions, and so on.

It's much easier to see what number it is since many numbers compose it.

Commas do not change the value, they are just there to help you read the number.

Thank You!!  

Actually, Guest, it depends on what you are finding percentage from!

If you want to change a fraction to a percentage, just solve it (by dividing the numerator by the denominator), move the decimal point 2 spots to the right, and add a percentage symbol.

Ex.

3/5=0.8=80%

For decimals, do the last two steps you did with fractions by moving the decimal point two spots to the right and adding a percentage symbol.

Ex.

0.638=63.8%

Just a tip, remember that percentages can be over 100%!

Like so:

You guys don't have to brag it is making me sad

Yes.

\(U_s=\int_{s_1}^{s_2}(-kx)dx \rightarrow U_s=-\frac{k}{2}(s_2^2-s_1^2)\)

First thing you do is find pi on your calculator. pi looked like this ~

                                                                                                    | |

Then you find your radius. Your radius is the number sitting there so let's say it is 8. You to pi *8. Then you find the square button multiply it by that and then you are done

Adding is when you take two numbers so let's say 1 and 4, and you combined them together and you get 5

Bill invests $150 at the end of each quarter at 6% compounded quarterly. What does this amount to in 10 years?

Bill should have accumulated $8,140.18 at the end of 10 ten years.

Here is the formula used to calculate this, if you wish to verify it:

FV=P[1 + R]^N - 1/ R=FV OF $1 PER PERIOD, Where R=interest rate per period, P=periodic payment, N=number of periods in the investment.