All categories

3 years ago

Please help me with this! I have been stuck on it for 15 minutes now!!

Mathematics

1 answer:

Romashka [77]3 years ago

3 0

The answer is C and E.

We need to first understnad that percentage can be converted into decimal numbers and fraction:

100% = 1.0 or 100/100

Hence:

40% = 0.4 or 40/100

To find the percentage of number, we use multiplication (which is also represented by the dot in the above options).

As C. and E. has the correct value, they are the correct answers.

Hope it helps!

You might be interested in

For every 5 chocolate cones sold, 7 vanilla cones are sold. On Monday, 70 chocolate cones were sold. How many cones were sold IN

FromTheMoon [43]

Answer: 168

Step-by-step explanation: 70/5=14. 14x7=98. 70+98=168.

5 0

3 years ago

253 students went on a field trip. Six

iris [78.8K]

Answer:38

Step-by-step explanation:

if there were 253 children and 6 buses and f 25 children had to go by car then,

253-25=228

228/6=38

3 0

3 years ago

Read 2 more answers

POSSIBLE POINTS 10

Olin [163]

94.2 in would be your answer

5 0

3 years ago

What is the mean absolute deviation?

Lostsunrise [7]

Answer:

0.8 cm

Step-by-step explanation:

The formula for MAD is attached in the picture.

x_i are the values (data)

x bar is the mean

n is the number of numbers (data)

For figuring out MAD, basically, <em>we subtract the mean from each of the values respectively and take the absolute value and SUM for all of the numbers in the data set. Then we divide by n, the number of numbers.</em>

<em />

Let's do this:

MAD = $\frac{|2-3|+|2-3|+|2-3|+|2-3|+|3-3|+|3-3|+|3-3|+|4-3|+|4-3|+|5-3|}{10}\\=\frac{1+1+1+1+0+0+0+1+1+2}{10}\\=\frac{8}{10}=0.8$

MAD is 0.8

6 0

3 years ago

A researcher claims that the variation in the salaries of elementary school teachers is greater than the variation in the salari

guajiro [1.7K]

Answer:

The null hypothesis is $H_o : \sigma^2_1 = \sigma^2 _2$

The alternative hypothesis is $H_a : \sigma_1 ^2 > \sigma^2_2$

$F_{critical} = 1.8608$

$F = 2.9085$

The decision rule is

Reject the null hypothesis

There is sufficient evidence to support the researchers claim

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 30$

The sample variance for elementary school is $s^2_1 = 8324$

The second sample size is $n_2 = 30$

The sample variance for the secondary school is $s^2_2 = 2862$

The significance level is $\alpha = 0.05$

The null hypothesis is $H_o : \sigma^2_1 = \sigma^2 _2$

The alternative hypothesis is $H_a : \sigma_1 ^2 > \sigma^2_2$

Generally from the F statistics table the critical value of $\alpha = 0.05$ at first and second degree of freedom $df_1 = n_1 - 1 = 30 - 1 = 29$ and $df_2 = n_2 - 1 = 30 - 1 = 29$ is