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Ilya [14]
3 years ago
14

How do I solve 4^-3? ( four to the power of negative three)

Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
7 0
4^-3 

You first need to make the exponent positive. To do this put it in a fraction.

1/4^3

Now solve the exponent. 

4 * 4 * 4 =
   ^
  16*4 = 64 

1/64 is your answer

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The cost to visit a famous tourist attraction in Russia is 442.25 Rubles. What is the cost in USD if the exchange rate is 3 USD
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Answer:

$14.5

Step-by-step explanation:

Given data

Cost for the visit=442.25 Rubles

exchange rate

3 USD= 91.5 Rubles

but 1 USD= 91.5/3

=  30.5

Therefore if 1 USD is 30.5 Rubles

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cross multiply

30.5x= 442.25

divide both sides by 30.5

x= 442.25/30.5

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The cost of the attraction is $14.5

6 0
3 years ago
For an A.P. ,The first two term are -3, 4. The 21st term is
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Answer:

The 21st term is 137.

Step-by-step explanation:

Arithmetic progression:

In an arithmetic progression the difference between consecutive terms is always the same, and its called common difference.

The nth term is given by:

a_n = a_1 + (n-1)d

In which a_1 is the first term and d is the common difference.

The first two terms are -3, 4.

This means that a_1 = -3, d = 4 - (-3) = 7

So

a_n = a_1 + (n-1)d

a_n = -3 + 7(n-1)

The 21st term is

a_{21} = -3 + 7(21-1) = -3 + 140 = 137

The 21st term is 137.

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