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WHATS THE DIFFRENCE!!!:(

(4*10)(2*10)=40*20=800

Was this a joke or were you really stuck on this?

Yes, but it's not a cheat sheet. It is for when you are stuck you can ask for help.

How did you calculate the number of zeros in 200! Do you know that there is a trick to find the number of trailing zero in ANY number, such as 10^12! ?

Actually, I don't need help anymore!!!

1. Simplify −2i√−12

\(-12=-1\times3\times4\)

We can move out the negative one and 4 from the square root. The square root of \(-1\) is \(i\)and the square root of \(4\)is \(2\)

We get -2i*i*2√3. We simplify that and get 4√3

2. Which expression is equal to 2√−28?

4i√7

−4i√7

4√7i

−4√7

Again, we do what we did last time.

-28=-1*4*7

We can move out the -1 and the 4 to get 2*i*2√7

We simplify this and get 4i√7

(note: I got tired using LaTeX)

I'm not sure what that means. I'm going to assume that the equation is \(c-2c-2c-2\)and 

\(c=7\)

We just substitute c:

\(c-2c-2c-2=7-2\times7-2\times7-2=7-2=\boxed{5}\), so the answer is 5.

​​​​​​

Um... okay...

We list the multiples of 12, and we are counting by 12's...

12*0=0

12*1=1

12*2=24

12*3=36

...

We get: 0, 12, 24, 36, 48, 60...

88/4 is 22

Yes to be fair I calculated the number of zeros in 100! and 200! and then I did the difference adding the two zeros for 100

Yep. And 100 and 200 are both part of the product

So are you asking for something like 200! but only to 100 and to determine the amount of zeros from the product?

c:

When you're writing a fraction in the calculator (for example: 1/2), put parentheses around what you are trying to make a fraction (for example: (1/2)). When you do this, it will show up as a fraction.

Hope this helps!

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I don't know I never really figured it out myself. 

Why? What do you need help with?

Evaluate abs(-4 b - 8) + abs(-b^2 - 1) + 2 b^3 where b = -2:
abs(-4 b - 8) + abs(-b^2 - 1) + 2 b^3 = abs(-4 (-2) - 8) + abs(-1 - (-2)^2) + (-2)^3×2

(-2)^2 = 4:
abs(-4 (-2) - 8) + abs(-4 - 1) + 2×(-2)^3

-4 (-2) = 8:
abs(8 - 8) + abs(-4 - 1) + 2×(-2)^3

8 - 8 = 0:
abs(0) + abs(-1 - 4) + 2×(-2)^3

-1 - 4 = -5:
abs(0) + abs(-5) + 2×(-2)^3

(-2)^3 = (-1)^3×2^3 = -2^3:
abs(0) + abs(-5) + 2×-2^3

2^3 = 2×2^2:
abs(0) + abs(-5) + 2 (-2×2^2)

2^2 = 4:
abs(0) + abs(-5) + 2 (-2×4)

2×4 = 8:
abs(0) + abs(-5) + 2 (-8)

Since 0 is at the origin, then abs(0) = 0:
abs(-5) - 8×2

Since -5<=0, then abs(-5) = 5:
5 - 8×2

2 (-8) = -16:
-16 + 5

5 - 16 = -11

distance=rate*time

.87=4t

.87/4=4t/4

.22=t

t=.22 hour or 13 minutes

Arrival time : 7:23am

\(\frac{1\frac{1}{2}}{\frac{1}{6}}=9\)

You are correct.  [27.1 x 1.01  =  27.371]

An exponent of '3/2' means that you need to cube the number and find the square root of that answer,

or, you can do it in the opposite order: you can find the square root of the number and cube that answer.

4^3/2  =  sqrt(4³)  =  sqrt(64)  =  8

4^3/2  = [ sqrt(4) ]³  =  [2]³  =  8

This site has a nice square root table:  http://www.classzone.com/cz/books/pre_alg/resources/pdfs/formulas_and_tables/palg_table_of_squares.pdf

I don't know what what "ADD number" means.

The income from an investment can be calculated using this formula:  Income  =  (Amount Invested) x (Percentage Rate)

Let  x  represent the amount of Investment #1  (8%)

Then  210 000 - x  represents the amount of Investment #2  (10%)

(Income from Investment #1)  +  (Income from Investment #2)  =  Total Income

(Amt Invested x Percentage)₁  +  (Amt Invested x Percentage)₂  =  Total Income

[ x · 0.08]  +  [ (210 000 - x) · 0.10 ]  =  18 300

0.08x  +  21 000 - 0.10x  =  18 300

               21 000 - 0.02x  =  18 300

                           - 0.02x  =  - 2 700

                                    x  =  135 000                     <--- amount invested at 8%

     210 000  -  135 000  =  75 000                        <--- amount invested at 10%

Good you