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elena55 [62]
3 years ago
11

What is the value of the expression 3^−4?

Mathematics
2 answers:
Wewaii [24]3 years ago
7 0
3^{-4}= \cfrac{1}{3^4} =\cfrac{1}{81}
hjlf3 years ago
4 0

Answer:

Answer is \frac{1}{81}

Step-by-step explanation:

Here we can apply the property of exponents  with negative exponents

in order to make exponent positive we can take the term in denominator which  makes the expression \frac{1}{3^4} and 3^4 means 81

therefore answer is \frac{1}{81}

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Michael bikes 36 miles last week and 38.4 miles this week. What is the average distance he bikes? Give your answer with the appr
erastovalidia [21]
Answer:  d. 37.2 mi
Because to find the average, you add the numbers together then you divided the amount of numbers added together.
    Like: 36+38.4 = 74.4/2 = 37.2
5 0
3 years ago
Simplify completely: the quantity 8 times x to the third power plus 6 times x to the 2nd power minus 4 times x all over negative
True [87]
The answer is <span>a.−4x^2 − 3x + 2
</span>
the quantity 8 times x to the third power plus 6 times x to the 2nd power minus 4 times x all over negative 2 times x is: \frac{8 x^{3}+6 x^{2} -4x }{-2x}

\frac{8 x^{3}+6 x^{2} -4x }{-2x} =  -\frac{8 x^{3}+6 x^{2} -4x }{2x}=- \frac{2x*4 x^{2} +2x*3x-2x*2}{2x} =- \frac{2x(4x^{2} +3x-2)}{2x} = \\  \\ =-(4x^{2} +3x-2)=-4x^{2} -3x+2
7 0
3 years ago
What is the area of a rectangle that is 2 meters long and 12 meters wide?
patriot [66]

Answer:

24m²

Step-by-step explanation:

To find the area of a rectangle, we use the formula A = l * w or Area = length * width.

We know that our length is 2 meters and our width is 12 meters so we can plug these values into the formula to get our answer.

A = 2 * 12 = 24

Remember that area is measured in "square" units and must be raised to the 2nd power.

A = 24m²

3 0
3 years ago
In a T-test, if your n=459, your DF is:<br><br> A. 459<br> B. 460<br> C. 458<br> D. A&amp;C
Stels [109]

Answer:

DF = 458

Step-by-step explanation:

In statistics, T-test have an extensive application. T-tests are used in hypothesis testing or inference about the population mean when the population standard deviation is not known. Nevertheless, they are used in making inference in paired samples or dependent samples t-test as well as independent samples.

The degrees of freedom, DF, is a characteristic of the student's t distribution which is used in T-tests. In a simple T-test;

DF = n - 1

where n is the sample size

Given n is 459, DF = 459 - 1 = 458

Therefore, DF = 458

6 0
3 years ago
In the Sahara Desert, one day the temperature was 58oC. On the same day, the temperature in Gobi Desert was -47oC. What is the d
rjkz [21]

Answer:

= 186 F

136 F is taken as the steam point

-50 F is taken as the ice point

∴ difference = steam point - ice point

= 136- (-50)

= 186F

3 0
3 years ago
Read 2 more answers
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