All categories

3 years ago

There are 8 squares. If 25 percent of the squares are red and the rest of them are blue, how many squares are red?

2 answers:

7 0

25% of 8
.25 x 8 = 2
2 of the squares are red and the rest our blue
So 8-2 = 6 blue squares

RED SQUARES = 2
BLUE SQUARES = 6

olga_2 [115]3 years ago

7 0

2 squares are red.

8 divided by 25% = 2.

8 x 0.25 = 2

0.25 = 25%

You might be interested in

1. r-8/5=-4/11<br> 2. 9a/a+4= 3/5

BigorU [14]

Answer:

1 r= 68/55

2 no solution

Step-by-step explanation:

3 0

3 years ago

This recipe makes 12 flapjacks.

Scorpion4ik [409]

Divide 12 by all of the ingredients then multiply them by 18

6 0

3 years ago

The prices of all college textbooks follow a bell-shaped distribution with a mean of $113 and a standard deviation of $12. Using

Soloha48 [4]

Step-by-step explanation:

In statistics, the empirical rule states that for a normally distributed random variable,

68.27% of the data lies within one standard deviation of the mean.

95.45% of the data lies within two standard deviations of the mean.

99.73% of the data lies within three standard deviations of the mean.

In mathematical notation, as shown in the figure below (for a standard normal distribution), the empirical rule is described as

$\Phi(\mu \ - \ \sigma \ \leq X \ \leq \mu \ + \ \sigma) \ = \ 0.6827 \qquad (4 \ \text{s.f.}) \\ \\ \\ \Phi(\mu \ - \ 2\sigma \ \leq X \ \leq \mu \ + \ 2\sigma) \ = \ 0.9545 \qquad (4 \ \text{s.f.}) \\ \\ \\ \Phi}(\mu \ - \ 3\sigma \ \leq X \ \leq \mu \ + \ 3\sigma) \ = \ 0.9973 \qquad (4 \ \text{s.f.})$

where the symbol $\Phi$ (the uppercase greek alphabet phi) is the cumulative density function of the normal distribution, $\mu$ is the mean and $\sigma$ is the standard deviation of the normal distribution defined as $N(\mu, \ \sigma)$ .

According to the empirical rule stated above, the interval that contains the prices of 99.7% of college textbooks for a normal distribution $N(113, \ 12)$ ,

$\Phi(113 \ - \ 3 \ \times \ 12 \ \leq \ X \ \leq \ 113 \ + \ 3 \ \times \ 12) \ = \ 0.9973 \\ \\ \\ \-\hspace{1.75cm} \Phi(113 \ - \ 36 \ \leq \ X \ \leq \ 113 \ + \ 36) \ = \ 0.9973 \\ \\ \\ \-\hspace{3.95cm} \Phi(77 \ \leq \ X \ \leq \ 149) \ = \ 0.9973$

Therefore, the price of 99.7% of college textbooks falls inclusively between $77 and $149.

5 0

2 years ago

39,012 in expanded form

Helen [10]

30,000 + 9,000 + 10 + 2

6 0

3 years ago

The probability of randomly selecting a name starting with the letter T from a bowl of 24 names is . Which of the following desc

lara31 [8.8K]

The probability of randomly selecting a name starting with the letter T from bowl of 24 names depends on the names that are in the bowl,. The number 24 says nothing about the names. There can be neither probability that the randomly selected name starts with T, if in the bowl none of the 24 names starts with T.
It could be also unlikely to select a name starting with T if there is a really small number of names in the bowl starting with T (for example 1 or 2 from 24). And it can be likely to chose a name that start with T if there are many names in the bowl starting with T.So, it is important to know the number of names in the bowl starting with T.

3 0

3 years ago