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atroni [7]
3 years ago
6

To receive a grade of A on an 80-question test, 90% of the questions must be answered correctly. What is the maximum number of q

uestions that can be missed to still receive an A?
Mathematics
1 answer:
marta [7]3 years ago
8 0

Answer:

The answer would be 8.

Step-by-step explanation:

This is a percentage question, and I have struggled with these before but this is the <em>easiest</em> way to solve it given these certain criteria.

Alright, so it's given that:

A) 90%= an A grade

and

B) This is an 80-question test.

Given these, we can do the following:

90% times 80, which equals <em>72</em>.

Just to check, we know that to convert percentages to fractions, we move the decimal two spots to the left, therefore 90%= 0.90, or 0.9. We take 72 and divide it by 80, and we get 0.9, thus showing that it is correct.

Then, we do 80-72 and using simple math we get 8.

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True or False?The first distribution shown below has a smaller standard deviation than does the second distribution.1, 2, 3, 4,
Mandarinka [93]

Answer:

False, they have the same standard deviation

Step-by-step explanation:

Standard deviation is the distance each data value is from the mean.

While the mean of each data set will be different, the distance each data value is from this mean will be the same.  This is because each set goes sequentially from 1 to 12, or from 101 to 112.  The average distance from the mean will have to be the same.

To verify, using a graphing calculator, the standard deviation of the first set is 3.45.  The standard deviation of the second set is also 3.45.

6 0
3 years ago
Read 2 more answers
Find the 14th term of the geometric sequence 10,40,160
Galina-37 [17]

Answer:

671,088,640.

Step-by-step explanation:

To determine the 14th term of the geometric sequence that begins with 10, 40 and 160, knowing that each number is multiplied by 4, the following calculation must be performed, taking into account that the initial number (10) is multiplied by 4, and that said number must be potentiated 13 times to obtain the 14th term:

10 x (4 ^ 13) = X

10 x 67,108,864 = X

671,088,640 = X

Therefore, the 14th term of the geometric sequence will be 671,088,640.

3 0
3 years ago
Please help I don’t understand
julia-pushkina [17]
The answer is 32.14
3 0
2 years ago
James is 8 years old. Last year, his father was 4 times as old as he was. In how many years' time will their combined age be 51?
Snowcat [4.5K]

Last year He was 7 years old.

His father is 4 times the age 7 x 4 = 28

Last year his dad was 28, so this year he is 29.

Combined age this year = 29 + 8 = 37

51 - 37 = 14 years

14/ 2 people = 7 years

8 + 7 = 15

29 + 7 = 36

15 + 36 = 51

It will take 7 years.

7 0
3 years ago
A translation is a type of transformation in which a figure is .
Romashka [77]

Answer:  Rotation

Step-by-step explanation:  can't be translation its tilted cant be reflection because of the tilt also cant be dilation because its the same size {hope this help's :{

7 0
3 years ago
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