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Naya [18.7K]
3 years ago
12

What is log(21/x2) written in expanded form?

Mathematics
2 answers:
jonny [76]3 years ago
8 0

Answer:

log(21)-2log(x)

Step-by-step explanation:

The given logarithmic expression is log(\frac{21}{x^2} ).

Observe that the expression in the argument is a quotient.

We apply the quotient property. This property is given as follows:

log(\frac{A}{B})=log(A)-log(B).

When we apply this property, we obtain,

log(\frac{21}{x^2})=log(21)-log(x^2).


Recall that log_a(m^n)=n\:log_a(m).


We now apply this property to obtain,


log(\frac{21}{x^2})=log(21)-2log(x).


Therefore the correct answer is A


Elan Coil [88]3 years ago
3 0
2log10(2vx2) is the answer
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Liula [17]

Answer:

7)141

8)65

Step-by-step explanation:

8 0
3 years ago
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How to solve this question #4 ?
gayaneshka [121]
This question is a piece-o-cake if you know the formulas for the area and volume of a sphere, and impossible of you don't.

Area of a sphere = 4 π R²  (just happens to be the area of 4 great circles)

Volume of a sphere = (4/3) π R³

We know the area of this sphere's great circle, so we can use the
first formula to find the sphere's radius.  Then, once we know the
radius, we can use the second formula to find its volume.

Area of 4 great circles = 4 π R²

Area of ONE great circle = π R²

           225 π cm²  =  π R²

               R²  =  225 cm²

               R  =  √225cm²  =  15 cm .

Now we have a number for R, so off we go to the formula for volume.

         Volume  =  (4/3) π R³

                      =  (4/3) π (15 cm)³

                      =  (4/3) π (3,375 cm³)

                       =      14,137.17  cm³      (rounded)

This answer feels very good UNTIL you look at the choices.
_____________________________________________________

I've gone around several loops and twists trying to find out what gives here,
but have come up dry.

The only thing I found is the possibility of a misprint in the question:  

If the area of a great circle is 225π cm², then the sphere's AREA is 900π cm².

I'm sure this is not the discrepancy.  I'll leave my solution here, and hope
someone else can find why I'm so mismatched with the choices.
5 0
3 years ago
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I WILL GIVE U A CROWN.......
steposvetlana [31]
<h3>Answer: Likely it's choice D) </h3>

See below for the explanation why

========================================================

down payment = 22% of home value

down payment = 22% of $426,000

down payment = 0.22*426,000

down payment = 93,720 dollars

The remaining amount mortgaged (i.e. loaned out) is

home value - (down payment) = 426,000 - 93,720 = 332,280

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

The monthly payment formula is

P = (L*i)/(1 - (1+i)^(-n))

where,

  • P = monthly payment
  • L = amount loaned
  • i = monthly interest rate in decimal form
  • n = number of months

In this case,

  • L = 332,280 dollars
  • i = 0.0525/12 = 0.004375 which is exact without any rounding
  • n = 20*12 = 240 months (equivalent to 20 years)

Plugging those three values into the formula mentioned gets us the following:

P = (L*i)/(1 - (1+i)^(-n))

P = (332,280*0.004375)/(1 - (1+0.004375)^(-240))

P = 2,239.0493959316

P = 2,239.05

Multiply this monthly payment by the 240 months mentioned.

2,239.05*240 = 537,372

This is the total amount paid back (principal + interest)

Add on the down payment to find out how much money total is handed over:  537,372 + 93,720 = 631,092

Unfortunately $631,092 is not listed as one of the answer choices. The closest would be D) $631,057

I'm not sure if I made a rounding error somewhere, or perhaps your teacher is using an amortization table. It's also possible your teacher made a typo somewhere. I'd ask them for clarification.  

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2 years ago
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son4ous [18]
The correct classification is 3/8 in a proper fraction
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Answer:

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