All categories

2 years ago

Find two consecutive whole numbers that 82 lies between.

2 answers:

7 0

Answer: The question as written is incomplete, but square root of 82 is between the whole numbers 9 and 10, whose squares are 81 and 100

Lelechka [254]2 years ago

5 0

The question as written is incomplete, but square root of 82 is between the whole numbers 9 and 10, whose squares are 81 and 100 respectively.

You might be interested in

How is multiplication using partial products similar to regrouping

vodka [1.7K]

Because you an in partial products you add the numbers like regrouping your still adding in regrouping

4 0

3 years ago

how many weeks of data must be randomly sampled to estimate the mean weekly sales of a new line of athletic footwear? We want 98

Ber [7]

Answer:

We need to sample at least 37 weeks of data.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.98}{2} = 0.01$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.01 = 0.99$ , so $z = 2.327$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

We want 98% confidence that the sample mean is within $500 of the population mean, and the population standard deviation is known to be $1300

This is at least n weeks, in which n is found when $M = 500, \sigma = 1300$

$M = z*\frac{\sigma}{\sqrt{n}}$

$500 = 2.327*\frac{1300}{\sqrt{n}}$

$500\sqrt{n} = 2.327*1300$

$\sqrt{n} = \frac{2.327*1300}{500}$

$(\sqrt{n})^{2} = (\frac{2.327*1300}{500})^{2}$

$n = 36.6$

Rounding up

We need to sample at least 37 weeks of data.

8 0

3 years ago

There are 5 red marbles, 8 blue marbles, and 12 green marbles in a bag.

cricket20 [7]

To find the percentage always multiply whatever decimal number you have by 100% <span>
1) 5 + 8 + 12 = 25 (total number in bag)
5/25 x 100% (because you're trying to find probability of red)
= 20%

2) 5 + 8 = 13 (# of red AND blue)
13/25 x 100% (divide out of the total)
=52%

3) 5/25 = 0.2 x 12/25 = 0.48 (find probability of drawing red and green)
0.2 x 0.48 x 100%
= 9.6%

4) 10 + 12 + 28 = 50 (to find total number of trials)
28/50 x 100%
= 56%

5) 5 x 7 (number of sections on first spinner multiply by # of sections on second spinner)
= 35</span><span>Its B 20%

</span>

3 0

3 years ago

Read 2 more answers

If f(x) = x2 – 1 and g(x) = 2x – 3, what is the domain of (fºg)(x)?

RUDIKE [14]

Answer:

(-∞, ∞)

Step-by-step explanation:

Given,

$f(x)=x^2-1 \ and\ g(x)=2x-3$