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4 years ago

What element is located at a31?

Mathematics

1 answer:

siniylev [52]4 years ago

7 0

Answer:

a31 = 11

Step-by-step explanation:

a31 is the 3rd row the 1st column

a31 = 11

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Mark currently works part-time with a salary of $8,000 per year. mark plans to quit working and attend college for 4 years. if h

BARSIC [14]

For the answer to the question above asking how long will it take a mark to recover his investment assuming he has a salary of $32,000 upon graduating?

The answer is Mark will lose:
4 * $ 8,000 = $32,000 ( without salary ) + $64,000 ( college costs ) =
= $96,000 in total
$96,000 : $32,000 = 3
Answer:
It will take Mark 3 years to recover his investments. Poor Mark

6 0

3 years ago

Simplify the equation. (5xE2 - 3x) - (5xE2 - 3x+1)

s2008m [1.1K]

Answer:

$\huge \boxed{\mathrm{-1}}$

Step-by-step explanation:

$(5xe^2 - 3x) - (5xe^2 - 3x+1)$

Distribute negative sign.

$5xe^2 - 3x- 5xe^2 +3x-1$

Combine like terms.

$0xe^2 +0x-1$

$0-1=-1$

8 0

4 years ago

You are knitting a blanket. You want the area of the blanket to be 24 feet squared . You want the length of the blanket to be 2

Sauron [17]

Think of it this way: x multiplied by a number that is two more than x is y.
So, look at the factors. 3 and 8 wouldn't work, because 8 is 5 longer than 3. 1 and 24 wouldn't work, because 24 is 23 more than 1. 12 and 2 is also not going to work; 12 is 10 more than 2. What you have left is 4 and 6. 6 is 2 more than 4, and they both multiply to get 24.

So, the correct answer is 6 feet long and 4 feet wide.

4 0

3 years ago

Read 2 more answers

(g + a)2 g = -5 and a = 25 Evaluate expression:

agasfer [191]

-5+25 is (20) and it’s in the parenthesis so it’s still connected by multiplication. your answer is 40.

5 0

3 years ago

Read 2 more answers

An ammunition producer claims his best product has an average lifespan of exactly 18 years. A skeptical product evaluator asks f

DochEvi [55]

Answer:

The 90% confidence interval for the true mean lifespan of this product is between 13.1 and 16.9 years.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 50 - 1 = 49

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.9}{2} = 0.95$ . So we have T = 1.6766

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 1.6766\frac{8}{\sqrt{50}} = 1.9$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 15 - 1.9 = 13.1 years

The upper end of the interval is the sample mean added to M. So it is 15 + 1.9 = 16.9 years

The 90% confidence interval for the true mean lifespan of this product is between 13.1 and 16.9 years.

8 0

3 years ago