1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Eddi Din [679]
3 years ago
14

PLEASE HELP ASAP!!! Will give brainliest!

Mathematics
2 answers:
Olin [163]3 years ago
6 0
(2.5*10^-8)(9*10^-10)

First, distribute a 1 so you can get rid of parentheses

2.5*10^-8*9*10^-10

Now, combine like terms

(2.5*9) (10^-8*10^-10)
2.25*10^-18
Shalnov [3]3 years ago
6 0
The best answer is the first one

 
hope it helps

You might be interested in
Sara wanted to gather data about the cost of local gyms in her area. She plotted the data and determined that the average gym co
snow_tiger [21]

\bf y = \stackrel{\stackrel{monthly~fee}{\downarrow} }{10}~~\stackrel{\stackrel{month}{\downarrow }}{x}+\underset{y-intercept}{\stackrel{\stackrel{registration~fee}{\downarrow }}{30}}~\hfill \impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}

6 0
3 years ago
Read 2 more answers
What number must you add to complete the square? x2 + 14x = -5
ale4655 [162]
None of them will get into a negative number. When you have like "2x" is the number twice, right? Some number has to be negative
3 0
4 years ago
Read 2 more answers
Me. Ellis is a teacher who tutors after school. Of the students he tutors, 30% need help in computer science and 70% need assist
Anna11 [10]

Answer: There are 82.5% after school students who are enrolled in his classes.

Step-by-step explanation:

Let the total number of students be 100

Percentage of students who need help in computer science = 30%

So, number of students who need help in computer science = 30

Percentage of students who need help in maths = 70%

So, number of students who need assistance in maths  = 70

Of the students who need help,

40% are enrolled in Mr. Ellis's class during the school day,

So, it means 60% are enrolled in his class after the school day.

Number of students who are enrolled in his class after the school day = 60

Number of students who need help in Maths is given by

\frac{70}{100}\times 60=42

Of the students that need help in maths, percent of students are enrolled in his class during the day = 25%

So, number of students who need help in maths and enrolled in his class after school hours

\frac{75}{100}\times 42=31.5

Number of students who need help in computer science and enrolled in his class after school hours

\frac{30}{100}\times 60=18

Therefore, there are 31.5+18=49.5 students who joined his class after school hours,

Percentage of the after students who are enrolled in Mr. Ellis's classes is given by

\frac{49.5}{60}\times 100=82.5\%

Hence, there are 82.5% after school students who are enrolled in his classes.


6 0
4 years ago
A quantity x has cumulative distribution function p(x) = x − x2/4 for 0 ≤ x ≤ 2 and p(x) = 0 for x < 0 and p(x) = 1 for x &gt
34kurt
F_X(x)=\begin{cases}0&\text{for }x2\end{cases}

Recall that the PDF is given by the derivative of the CDF:

f_X(x)=\dfrac{\mathrm dF_X(x)}{\mathrm dx}=\begin{cases}1-\dfrac x2\\\\0&\text{otherwise}\end{cases}

The mean is given by

\mathbb E[X]=\displaystyle\int_{-\infty}^\infty x\,f_X(x)\,\mathrm dx=\int_0^2\left(x-\dfrac{x^2}2\right)\,\mathrm dx=\frac23

The median is the number M such that F_X(x)=\mathbb P(X\le M)=\dfrac12. We have

F_X(M)=M-\dfrac{M^2}4=\dfrac12\implies M=2\pm\sqrt2

but both roots can't be medians. As a matter of fact, the median must satisfy 0\le M\le2, so we take the solution with the negative root. So M=2-\sqrt2 is the median.
3 0
4 years ago
Please tell me the number four and five instructions are solve the system of simultaneously equation by using the substitution m
Alex777 [14]
4. 3x+(-x)=4
3x-x=4
2x=4
x=4/2
answers:
x=2
y=-2


5.
y=x-1
4x-y=19
-x+y=-1
4x-y(cross the y’s out they cancel eachother)=19
3x=18
x=6
-6+y=-1
y=-1+6
y=5
answers:
x=6
y=5
4 0
2 years ago
Read 2 more answers
Other questions:
  • Solve the equation: 3(x−3) + 2x= −49
    14·1 answer
  • Which is more,5 ounces or 1 pund
    11·2 answers
  • What is the answer please please help me
    6·1 answer
  • Answer each question. What is 35% of 90x? What percent of 16x is 9x?
    5·2 answers
  • during the 2010 great backyard bird count,an average of 42 bald Eagles were counted in each of 20 location throughout alaska. in
    6·1 answer
  • 7/9 multiplued by7/8
    10·1 answer
  • 11. You earn $500 in 80 hours. At that rate. how much would you eam in 200 hours?
    12·2 answers
  • How do I find the variable?
    5·1 answer
  • What is the slope for this table? <br> Give an explanation.
    15·2 answers
  • A mom shared $490 between her 2 daughters in the ratio of 4 : 3 respectively. Calculate how much money is the larger share?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!