<h3><u>Given</u>:-</h3>
Side(a) of the cube =
.
<h3><u>To Find</u>:-</h3>
Surface Area of the cube with side 
<h3><u>Formula Used</u>:-</h3>
Surface area of cube = 
<h3><u>Solution</u>:-</h3>
Surface area of cube =
(putting the value of a from the above given)




Therefore, surface area of the given square = 
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Hope it helps you:)
Answer:
C.97
Step-by-step explanation:
2y-1.5y=2
0.5y=2
y=1
10x-5x=4
x=4/5
Answer:
Assuming ages are normally distributed, the 98% confidence interval for the population average age is [26.3, 35.7].
Step-by-step explanation:
We have to construct a 98% confidence interval for the mean.
The information we have is:
- Sample mean: 31
- Variance: 49
- Sample size: 15
- The age is normally distributed.
We know that the degrees of freedom are

Then, the t-value for a 98% CI is t=2.625 (according to the t-table).
The standard deviation can be estimated from the variance as:

The margin of error is:

Then, the CI can be constructed as:

<u>Answer</u>
−1 + i times the square root of 7
<u>Explanation</u>
x² + 2x + 8
I will use the complete square method to find the value of x.
x² + 2x + 8
x² + 2x = -8
x² + 2x + (2/2)² = -8 + (2/2)²
x² + 2x + 1 = -7
(x + 1)² = -7
x + 1 = √(-7)
x = √(-7) - 1
= i√7 - 1
= -1 + i√7
<em>−1 + i times the square root of 7
</em>