Answer this problems for me please

Mathematics

1 answer:

Alla [95]4 years ago

7 0

When multiplying terms with the same base with exponents, you keep the base and add the exponents.

2^4 * 2^3 = 2^7

Any number with an exponent of zero equal one.

4^0 = 1

Multiply exponents when the term is being multiplied by a power.

(2^4)^3 = 2^12

When dividing terms with exponents, you keep the base and subtract the exponents.

9^7/9^5 = 9^2 9^5/9^7 = 1/9^2

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At a small private college, 9/20 of the students are female. If there are 2,160 female students,

pav-90 [236]

Answer:

2,640

Step-by-step explanation:

6 0

3 years ago

Which rule would best describes this pattern 8,4,10,6,12,8,14

irinina [24]

Answer:

Subtract 4 and then add 6.

Step-by-step explanation:

8-4=4

4+6=10

10-4=6

6+6=12

12-4=8

8+6=14

The rule for this pattern can be subtracting 4, and then adding 6.

3 0

3 years ago

in a random sample of 28 people, the mean commute time to work was 31.2 minutes and the standard deviation was 7.3 minutes. assu

antoniya [11.8K]

Answer:

The margin of error of u is of 3.8.

The 99% confidence interval for the population mean u is between 27.4 minutes and 35 minutes.

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 = 28 - 1 = 27

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 27 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.99}{2} = 0.995$ . So we have T = 2.7707