I don’t understand, spent 2 hours on it

Help Plz Due Tmrw. ......

romanna [79]

Answer:

i´ll help here

the smallest is (-3)^0

the second smallest or biggest is 16^1/2

the biggest one is (1/27)^-1/3

Step-by-step explanation:

hope this is correct

4 0

3 years ago

Read 2 more answers

The time needed to complete a final examination in a particular college course is normallydistributed with a mean of 80 minutes

Artist 52 [7]

Answer:

a) 0.023

b) 0.286

c) 10 students will be unable to complete the exam inthe allotted time.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 80 minutes

Standard Deviation, σ = 10 minutes

We are given that the distribution of time to complete an exam is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) P(completing the exam in one hour or less)

P(x < 60)

$P( x < 60) = P( z < \displaystyle\frac{60 - 80}{10}) = P(z < -2)$

Calculation the value from standard normal z table, we have,

$P(x < 60) =0.023= 2.3\%$

b) P(complete the exam in more than 60 minutes but less than 75 minutes)

$P(60 \leq x \leq 75) = P(\displaystyle\frac{60 - 80}{10} \leq z \leq \displaystyle\frac{75-80}{10}) = P(-2 \leq z \leq -0.5)\\\\= P(z \leq -0.5) - P(z < -2)\\= 0.309- 0.023 = 0.286= 28.6\%$

c) P(completing the exam in more than 90 minutes)

P(x > 90)

$P( x > 90) = P( z > \displaystyle\frac{90 -80}{10}) = P(z > 1)$

$= 1 - P(z \leq 1)$

Calculation the value from standard normal z table, we have,

$P(x > 90) = 1 - 0.8413 = 0.1587 = 15.87\%$

15.87% of children of class will require more than 90 minutes to complete the test.

Number of children =

$\dfrac{15.87}{100}\times 60 = 9.52\approx 10$

Approximately, 10 students of class will require more than 90 minutes to complete the test.

4 0

3 years ago

SEND HELP I JUST WANNA TAKE A NAP

aleksandr82 [10.1K]

C or a i think is one of the answer

8 0

3 years ago

The ratio of boys to girls at CMS is 5 to 6. How many girls are there if there are 480 boys?

Vesnalui [34]

480/6 is 80.
80 x 5 is 400.
So there are 400 girls.

6 0

3 years ago

Segment AB has point A located at (6, 5). If the distance from A to B is 5 units, which of the following could be used to calcul

Step2247 [10]

$\bf \textit{distance between 2 points}\\ \quad \\
\begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
% (a,b)
A&({{ 6}}\quad ,&{{ 5}})\quad 
% (c,d)
B&({{ x}}\quad ,&{{y}})
\end{array}\qquad 
% distance value
d = \sqrt{({{ x_2}}-{{ x_1}})^2 + ({{ y_2}}-{{ y_1}})^2}
\\\\\\
\textit{if the distance \underline{d} is 5, then }5=\sqrt{(x-6)^2+(y-5)^2}$

7 0

3 years ago