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bixtya [17]
2 years ago
10

Which expression is equivalent to 2.3 x 2.3 x 2.3 x 2.3 x 2.3?

Mathematics
2 answers:
aev [14]2 years ago
4 0

The expression (2.3)⁵ is equivalent to 2.3 x 2.3 x 2.3 x 2.3 x 2.3

Brrunno [24]2 years ago
4 0

Step-by-step explanation:

2.3 \times 2.3 \times 2.3 \times 2.3 \times 2.3 will be equivalent to 2.3^{5}.

2.3^5 is a shorted way of saying 2.3 multiplied by itself 5 times.

<u>Solving:</u>

<u />2.3 \times 2.3 \times 2.3 \times 2.3 \times 2.3

5.29 \times 2.3 \times 2.3 \times 2.3 Equivalent.

12.167 \times 2.3 \times 2.3 Equivalent.

27.9841 \times 2.3 Equivalent.

64.36343 Equivalent.

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2.4 + 5.4q – 4.5q + 3.6<br><br> a.6+1.1q<br> b.9.9q+6<br> c.0.9q+6<br> d.9.9q-6
Yuri [45]
You have to add the same kind of terms, in this case the ones that have a variable (5.4q and -4.5q) and the ones that don't (2.4 and 3.6), like this:

(5.4q - 4.5q) + (2.4 + 3.6) = 0.9q + 6

The answer is c. 0.9 +6

8 0
3 years ago
WILL GIVE BRAINLIEST ANSWER
Stels [109]

Answer:

400$

Step-by-step explanation:

100$ is 25% of 400

7 0
3 years ago
Read 2 more answers
Suppose the radius of a circle is 3 units. What is its cercumference?
salantis [7]
It should be 6, radius is half of the circumference (6/3=2).
6 0
3 years ago
Read 2 more answers
The graph of the piecewise function f(x) is shown.
NeTakaya

Answer:

{f(x) | -∞ < f(x) ≤ 4 }

Step-by-step explanation:

The range is made up of the y values.  Remember f(x) = y

In this graph the least value of y is -∞ and the greatest value of y is 4

So, the range is {f(x) | -∞ < f(x) ≤ 4 } which is the 2nd choice

4 0
2 years ago
One stats class consists of 52 women and 28 men. Assume the average exam score on Exam 1 was 74 (σ = 10.43; assume the whole cla
Svetllana [295]

Answer:

(A) What is the z- score of the sample mean?

The z- score of the sample mean is 0.0959

(B) Is this sample significantly different from the population?

No; at 0.05 alpha level (95% confidence) and (n-1 =79) degrees of freedom, the sample mean is NOT significantly different from the population mean.

Step -by- step explanation:

(A) To find the z- score of the sample mean,

X = 75 which is the raw score

¶ = 74 which is the population mean

S. D. = 10.43 which is the population standard deviation of/from the mean

Z = [X-¶] ÷ S. D.

Z = [75-74] ÷ 10.43 = 0.0959

Hence, the sample raw score of 75 is only 0.0959 standard deviations from the population mean. [This is close to the population mean value].

(B) To test for whether this sample is significantly different from the population, use the One Sample T- test. This parametric test compares the sample mean to the given population mean.

The estimated standard error of the mean is s/√n

S. E. = 16/√80 = 16/8.94 = 1.789

The Absolute (Calculated) t value is now: [75-74] ÷ 1.789 = 1 ÷ 1.789 = 0.559

Setting up the hypotheses,

Null hypothesis: Sample is not significantly different from population

Alternative hypothesis: Sample is significantly different from population

Having gotten T- cal, T- tab is found thus:

The Critical (Table) t value is found using

- a specific alpha or confidence level

- (n - 1) degrees of freedom; where n is the total number of observations or items in the population

- the standard t- distribution table

Alpha level = 0.05

1 - (0.05 ÷ 2) = 0.975

Checking the column of 0.975 on the t table and tracing it down to the row with 79 degrees of freedom;

The critical t value is 1.990

Since T- cal < T- tab (0.559 < 1.990), refute the alternative hypothesis and accept the null hypothesis.

Hence, with 95% confidence, it is derived that the sample is not significantly different from the population.

6 0
3 years ago
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