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3 years ago

13

It took Kendra 12 minutes to ride her bike 3.25 miles. If she rode at an average rate,how long did it take her to travel one mil

e?

1 answer:

MakcuM [25]3 years ago

7 0

2.7 time for every mile

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SEQUENCES AND SERIES

Romashka [77]

Answer:

Step-by-step explanation:

As we Know that formula for arithmetic sequence is

$a_n=a_1+(d-1)$

and for geometric sequence is

$a_n=a1*r^(n-1)$

So,

According to given conditions

$a+7d=a*r^5 (i)\\ a+19d=a*r^7 (ii)$

By dividing equation (i) and (ii)

Hence proved that

$r^2=a+19d/a+7d$

5 0

3 years ago

Forbes reports that women trust recommendations from Pinterest more than recommendations from any other social network platform

Keith_Richards [23]

Answer:

The point estimate of the proportion of women who trust recommendations made on Pinterest is of 0.78.

Step-by-step explanation:

To find the point estimate of the proportion of women who trust recommendations made on Pinterest, we find the sample proportion.

In this question:

150 women

117 trust recommendations made on Pinterest.

Point estimate:

$p = \frac{117}{150} = 0.78$

The point estimate of the proportion of women who trust recommendations made on Pinterest is of 0.78.

5 0

2 years ago

A professor at UCI wants to see what students really remember from their elementary school days, the stuff that was taught or th

denis-greek [22]

Answer:

3. t-test for the difference between means for two related samples.

Step-by-step explanation:

It is given that a professor of UCI wishes to study what really the students remember from their elementary school days and other such stuffs that were very popular at that time.

therefore the professor put forward two test. In one of the test, he put some question from the elementary school and in other he put one question about a pop culture from that time. He used the same sample for both the tests.

So, since the professor involved the same set of students in his experiment for both the tests, so both the samples are related samples.

Therefore, the test uses is a t - test that is used for the difference between the related samples.

3 0

2 years ago

Paige had $20 to spend on 6 pieces of candy. After buying the candy, she has $6.50 left. How much was each piece of candy?

irga5000 [103]

Answer:

$2.25

Step-by-step explanation:

1. 20-6.50= 13.50

2. 13.50/6(pieces of candy) = $2.25

8 0

3 years ago

372-199= What’s the answer

Montano1993 [528]

Answer:

Step-by-step explanation:

The answer is 173. Just use the calculator

3 0

3 years ago

Read 2 more answers