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Ostrovityanka [42]
3 years ago
13

7. A computer company that recently developed a new software product wanted to estimate the mean time taken to learn how to use

this software by people who are somewhat familiar with computers. A random sample of 12 such persons was selected. The following data give the times taken (in hours) by these persons to learn how to use this software. 1.75 2.25 2.4 1.9 1.5 2.75 2.15 2.25 1.8 2.2 3.25 2.6 a. What is the point estimate of the population mean
Mathematics
1 answer:
Ulleksa [173]3 years ago
3 0

Answer:

What company

Step-by-step explanation:

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Question 10: 5 ÷ 5 + 4 × 12
kirill115 [55]
45
5 divided by 5 equals 1
1 plus 4 equals 5
5 times 12 equals 45
6 0
3 years ago
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A biologist is studying the elk population in a county park. She starts with only 2 elk and observes that the number of elk trip
DochEvi [55]

Answer:

The expression that represents the population of elk is: \text{elk}(t) = 2*3^t. It'll take 6 years for the population to reach 1,458 individuals.

Step-by-step explanation:

Since the number of elks triples every year and starts at \text{elk}(0) = 2, then after the first year the population will be:

\text{elk}(1) = \text{elk}(0)*3 = 2*3

While on the second year, it'll be:

\text{elk}(2) = \text{elk}(1)*3 = 2*3*3 = 2*3^2

On the third year:

\text{elk}(3) = \text{elk}(2)*3 = 2*3^2*3 = 2*3^3

And so on, therefore the expression that describes the population of elk as the years passes is:

\text{elk}(t) = 2*3^t

If we want to know the number of years until the population reach 1,458 elk, we need to apply this value to the left side of the equation and solve for t.

1458 = 2*3^t\\3^t = \frac{1458}{2}\\3^t = 729\\ln(3^t) = ln(729)\\t*ln(3) = ln(729)\\t = \frac{ln(729)}{ln(3)} = 6

The population will reach 1,458 elk in 6 years.

8 0
3 years ago
Which expression has the same value as the one below?
mihalych1998 [28]

Answer:

Option A

Step-by-step explanation:

22+(-32) is the same thing as 22-32.

22-32=-10

<h3>Let's see if the given options are equal:</h3>

Option A:

22+(-22)+(-10) \\22-22-10\leftarrow \text{Distribute -1 into the Parentheses.} \\0-10\\\boxed {-10}

Option A's expression has the same value as the expression given.

Option B:

22+(22)+(-10)

22+22-10\\44-10\\\boxed {34}

Option B's expression does not have the same value as the expression given.

Option C:

22+(-22)+(10)\\22-22+10\\0+10\\\boxed {10}

Option C's expression does not have the same value as the expression given.

Option D:

22+0+32\\22+32\\\boxed{54}

Option D's expression does not have the same value as the expression given.

<h3>The correct answer should be A: 22+(-22)+(-10).</h3>
5 0
3 years ago
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Gina went to a restaurant for lunch. On her bill the sales tax equals $2.34. If the tax is 8.5%, what was the subtotal (without
bagirrra123 [75]

Answer:

$2.5389

Step-by-step explanation:

Given data

Cost of lunch = $2.34

Tax= 8.5%

Let us compute the cost of the tax

=8.5/100*2.34

=0.085*2.34

= $0.1989

Hence the total is = 0.1989+2.34

=$2.5389

4 0
3 years ago
HELPPP PLZZZ I BEGZZZ
valkas [14]

Answer:

I use schoology too.

Step-by-step explanation:

Just copy and paste it and look it up. Internet always helps.

4 0
3 years ago
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