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Neither of those explanations are correct...

The first one states that you multiply 19.5% by 15 to find the total amount of decay. But in the problem you need to raise 19.5% to the 15th power instead of multiply it by 15...

For the second one, decay doesn't work at a common rate...decay is taking off a chunk of the remainder of what's left not of the original total.

Hope this helps!

Check hecticar's correct answer here:

25n  +  2  =

5 * 25  +  2  =127

Or... you can check this out:

The first case that you can remeber is if the next three digits are the same. There are 7*10*10= 700 ways to have the first three digits. Since you repeat the next three number again, that means that there is only 1 more digit that can be different from the rest which has 10 different options. There are 7000 ways for the first case and the second case is the same making your answer 7000*2=14000 seven-digit phone numbers.

*Correct me if something is wrong

Hope it helps!

There are an infinite number of solutions to this question.

If it decays 19.5% per minute, that means that 100%-19.5%= 80.5% of the element remains after each minute. If it decays for 15 minutes, that means the mass would be calculated by 590*80.5^15= 22.8 grams to the nearest 10th.

Hope it helps!

The word MATH has 4 letters. So we divide 2009 by 4. We get a remainder of 1, and the first letter of the word MATH is M, so the answer is M.

Units Digit of the Powers of 3:

3^1=3

3^2=9

3^3=7

3^4=1

3^5=3

Now we see that the units digit of 3 repeats every 4 powers. 4 goes into 2004 without any remainder. The units digit of 3^4 is 1, therefore the units digit of 3^2004 is 1.

Sweet

No Problem. Btw I friended you on Roblox.

3x - 2x  + 5 - 6  =  9 + t  +  x

x - 1   = 9 + t + x

-1 = 9 +  t

-10  = t

Side  of square  =  48/4  =  12 in

Side of equilateral triangle = 48/3   = 16 in

So

side of triangle / side of square  =   16  /12  =     4 / 3

Last question of the day for me, the perimeter of the rectangle is 8x+44 which equals 76, that makes x= 4 feet. The length equals 3*4+10= 22 and the width equals 4+12= 16. The area is 16*22= 352.

Hope it helps!

Let  the number  of  original yellow marbles  =  Y

Let the number  of original blue  marbles  be = B

And we know  that    B/Y  = 4/3  ⇒  B = (4/3)Y  ⇒  Y = (3/4)B

And  we  have  that

B + 5           7

_____  =   ___  

Y - 3           3

Subbing  for  Y  we  have that

B + 5                     7

_________  =     ___     cross-multiply

(3/4)B - 3              3

3(B + 5)  = 7 [ (3/4)B - 3 ]      simplify

3B + 15 = (21/4)B - 21      add 21 to both sidws, subtract 3B from both sides

36    =  (21/4 - 3)B

36  = ( 21/4 - 12/4) B

36  = (9/4)B      multiply both sides  by 4/9

16  = B  =  original number of  blue marbles

I giveth thy welcometh. 

its ok i already appreciate what u have done for me today

And sorry, I won't be able to answer any more of your questions today, I'm wrapping up for today.

i believe that is right thank u

Based on the information given, there are 24 parallelograms on top and 24 on bottom, that makes 48 sides with a length of 20 feet. There are also four sides with a length of 62 feet. So your answer is 48*20+4*62= 1208 feet.

Hope it helps!

Since there are 1000 milliliters in a liter, that means that there are 33.8/1000 fluid ouncers per milliliter. That means that each 200 mil bottle is 6.76 fluid ounces or 33.8/1000*200. 45/6.76 = 6.66 but you have to round up to a whole number of bottles since you can buy 2/3 of a bottle which makes your answer 7 bottles.

thank u cal