Ask question

Ask question

All categories

3 years ago

7

The cost of dinner for Mr. and Mrs. Manning was $34.00, but with the tip, they spent $39.10. What percent tip did they give, rou

nded to the nearest integer?

2 answers:

Dafna11 [192]3 years ago

8 0

Mr. and Mrs. Manning tipped 15%.

lisabon 2012 [21]3 years ago

4 0

Answer: the tip was of 15%

Step-by-step explanation:

$39.10 - $34 = $5.10

$34___100%

$5.10___ x = 15%

(5.10 * 100) / 34 = 15

You might be interested in

A professor thinks that the students in her statistics class this term are less creative than most students at this university.

choli [55]

Answer:

It is not enough evidence to reject null hypothesis. It is not enough evidence to say that mean score is not equal to 35.

Step-by-step explanation:

$\mu=35\\n=23\\\=x=33\\s=5\\\alpha=0.1$

1. Null and alternative hypothesis

$H_{0}:\mu=35\\H_{1}:\mu$

2. Significance level

$\alpha=0.1\\1-\alpha=0.99$

Freedom degrees is given by:

$v=n-1\\v=23-1=22$

For a sgnificance level of 0,01 and 22 freedom degrees, t-student distribution value is:

$t_{0.01;23}=-2. 5083$

3. Test statistic

$t=\frac{\=x-\mu}{\frac{s}{\sqrt{n} } }$

$t=\frac{33-35}{\frac{5}{\sqrt{23} } }$

$t=-1,918$

In this case, we have an one left tailed analysis, it means that null hypothesis is rejected if $t$

$-1.918>-2.5083$

Conclusion:

It is not enough evidence to reject null hypothesis. It is not enough evidence to say that mean score is not equal to 35.

3 0

2 years ago

The drama Club meets in the school auditorium every 2 days, and the choir meets There every 5 days. If the groups are both meeti

aalyn [17]

Answer:

7dias

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

How to add fractions with different denominators and negative numbers?

Kisachek [45]

Let find the least of common multiple = LCM it’s for the denominators.
Multiple of the numerator then the denominator to get the denominators
Don’t forget to to add the numerator but leave the denominators the same

8 0

3 years ago

Which equation represents the line shown?

vredina [299]

Answer:

B

Step-by-step explanation:

The line is running only across coordinate points with an x coord of 2

5 0

2 years ago

a fruit salad contains 20 different pieces of fruit. there are 3 pieces of apple, 8 pieces of watermelon, 7 pieces of banana, an

Neko [114]

There are 2 oranges, if that’s what the question was?

8 0

2 years ago

Read 2 more answers