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polet [3.4K]
3 years ago
7

I’m so confused! Please help! :)

Mathematics
1 answer:
s2008m [1.1K]3 years ago
8 0

Answer:

The answer is 18.84

Step-by-step explanation:

The diameter is 6.

Circumference = d\pi

6 * 3.14 = 18.84

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Triangle ADE is enlarged to form triangle ABC. What is the scale factor?
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I need this answer to please when you get the answer will you let me know thank you!!
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roger has a nail that is 12 centimeters long. he measures and records the length of the nail as 15 centimeters. what is the % er
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15-12=3. 3/12=1/4=25% error
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2 years ago
chelsea and shawna are selling cheesecakes for a school fundraiser. customers can buy french silk cheesecakes and apple cheeseca
Juliette [100K]

Answer:

Shawna price went up by 12 dollars because of 2 extra french silks. I divides 12 by 2 and got 6 dollars.I subtracted 12 dollars from 20 and divides the rest by 3 and got 2.66$

  1. FRENCH SILK CHEESECAKE: 6$
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6 0
3 years ago
Philip and Kevin are hoping to earn enough money to buy concert tickets for a show that costs $225 her concert tickets. Philip a
liubo4ka [24]

Answer:

Kevin will earn the money before than Philip

Philip needs at least 4 weeks

Kevin needs at least 3 weeks

Step-by-step explanation:

Let's call x to the number of weeks

Philip works 6 hours each weekend, which means 6 hours per week, earning $8.75 per hour, which is equivalent to 6*8.75 = $52.5 per week

Philip has already saved $45. Then he needs the next number of weeks:

52.5*x + 45 = 225

x = (225 - 45)/52.5

x = 3.4

Philip needs at least 4 weeks

Kevin works 3 hours per day for 3 days a week, which means 9 hours per week, earning $7.5 per hour, which is equivalent to 9*7.5 = $67.5 per week

Kevin has already saved $30. Then he needs the next number of weeks:

67.5*x + 30 = 225

x = (225 - 30)/67.5

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Kevin needs at least 3 weeks

8 0
3 years ago
In a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time they spend using the Interne
Dvinal [7]

Answer:

b. Do not reject H0. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.7 hours.

Step-by-step explanation:

Given that in a study of computer use, 1000 randomly selected Canadian Internet users were asked how much time they spend using the Internet in a typical week. The mean of the sample observations was 12.9 hours.

H_0: \bar x =12.7\\H_a: \bar x >12,7

(Right tailed test at 5% level)

Mean difference = 0.2

Std error = \frac{6}{\sqrt{1000} } \\=0.1897

Z statistic = 1.0540

p value = 0.145941

since p >alpha we do not reject H0.

b. Do not reject H0. We do not have convincing evidence that the mean weekly time spent using the Internet by Canadians is greater than 12.7 hours.

5 0
3 years ago
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