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chubhunter [2.5K]

3 years ago

10

Part A

1 answer:

anygoal [31]3 years ago

6 0

Part A is incorrect because for negative numbers, the greater the magnitude the smaller the number. -2 is smaller than -1, for example, and -20 is smaller than -15.

An elevation of -15ft means 15 ft below sea level, an elevation of -20ft means 20 ft below sea level, and an elevation of (+) 7ft means 7 ft above sea level.

If John started the trail at sea level (0ft elevation), then the greatest change in elevation would be between that and the second rest stop. Take the absolute value of all the numbers and see which one is the largest.

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An English professor assigns letter grades on a test according to the following scheme. A: Top 15% of scores B: Scores below the

lisabon 2012 [21]

Answer:

59 to 66

Step-by-step explanation:

Mean test scores = u = 74.2

Standard Deviation = $\sigma$ = 9.6

According to the given data, following is the range of grades:

Grade A: 85% to 100%

Grade B: 55% to 85%

Grade C: 19% to 55%

Grade D: 6% to 19%

Grade F: 0% to 6%

So, the grade D will be given to the students from 6% to 19% scores. We can convert these percentages to numerical limits using the z scores. First we need to to identify the corresponding z scores of these limits.

6% to 19% in decimal form would be 0.06 to 0.19. Corresponding z score for 0.06 is -1.56 and that for 0.19 is -0.88 (From the z table)

The formula for z score is:

$z=\frac{x-u}{\sigma}$

For z = -1.56, we get:

$-1.56=\frac{x-74.2}{9.6}\\\\ x = 59$

For z = -0.88, we get:

$-0.88=\frac{x-74.2}{9.6}\\\\ x = 66$

Therefore, a numerical limits for a D grade would be from 59 to 66 (rounded to nearest whole numbers)

7 0

4 years ago

What is 10×2/5 in unit form?

saveliy_v [14]

10*2/5= 20/5 = 4 = 4.0 where 4 is the unit.(whole number)

8 0

3 years ago

Read 2 more answers

Based on survey results, the mean amount of credit card debt for U.S. adults under 35 is $8,724. This point estimate would be un

Maslowich

Answer:

B. A random sample of 2,800 U.S. adults under 35.

Step-by-step explanation:

To have an unbiased and accurate sample, the sample should be representative of the population about which we are inferring.

Also, the bigger the sample size, the less margin of error we will have in the inference.

As the population in this survey is about the US adults under 35, the sample should be selected from this group.

From the options that select from this population, the largest sample is 2,800.

So the answer is Option B.

7 0

3 years ago

Six digits are chosen randomly from the set {0,1,2,…,9} a.) What is the probability that all six digits are the same? b.) What i

Hunter-Best [27]

Answer:

a) 0.00001

b) 0.001

Step-by-step explanation:

Given numbers,

0, 1, 2, 3, 4, 5, 6, 7, 8, 9

a) If by these numbers we have to make six digit number,

So, the total ways of arranging 6 digit number = $10^6$

Now, if all six digit in the number are same,

Then the possible ways = 10 ( eg : 000000, 111111, 222222, 333333, 444444... etc ),

Hence, the probability that all six digits are the same

$=\frac{10}{10^6}=\frac{1}{10^5}=0.00001$

b) The ways that five or more of the digits of the same = exactly 5 digits are same + Exactly 6 digits are same

∵ The ways that 5 digits are same = 10 × 9 = 90 (i.e. 111110, 111112, 111113,.....9 times, 222220, 222221,.....9 times .... etc..)

So, the number of ways that 5 or more than 5 digits are same = 90 + 10 = 100

Hence, the probability that five or more of the digits of the same

$=\frac{100}{10^5}$

$=0.001$

8 0

4 years ago

Liz spent $170 in 5 days on food and groceries. What integer best represents the average amount her checking account changed per

ahrayia [7]

Answer:It is 34:1

brainliest please

6 0

3 years ago