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
earnstyle [38]
3 years ago
10

The ratio of students packing a lunch to those buying a lunch is 2:9. The number of students buying lunch is how many times the

number of students packing a lunch?
Mathematics
2 answers:
Gekata [30.6K]3 years ago
4 0

Answer:

4.5 9 divided by 2 = 4.5

Step-by-step explanation:

9 divided by 2 = 4.5

Marta_Voda [28]3 years ago
3 0
 4.5 times the number of students packing a lunch
You might be interested in
Please help me......................................
Irina18 [472]

Answer:

148.5

Step-by-step explanation:

times all

3 0
3 years ago
Find the value of n <br><br> Thank you
melisa1 [442]

Answer:37

Step-by-step explanation:sorry if its worng

8 0
3 years ago
Use the exponential decay​ model, Upper A equals Upper A 0 e Superscript kt​, to solve the following. The​ half-life of a certai
Akimi4 [234]

Answer:

It will take 7 years ( approx )

Step-by-step explanation:

Given equation that shows the amount of the substance after t years,

A=A_0 e^{kt}

Where,

A_0 = Initial amount of the substance,

If the half life of the substance is 19 years,

Then if t = 19, amount of the substance = \frac{A_0}{2},

i.e.

\frac{A_0}{2}=A_0 e^{19k}

\frac{1}{2} = e^{19k}

0.5 = e^{19k}

Taking ln both sides,

\ln(0.5) = \ln(e^{19k})

\ln(0.5) = 19k

\implies k = \frac{\ln(0.5)}{19}\approx -0.03648

Now, if the substance to decay to 78​% of its original​ amount,

Then A=78\% \text{ of }A_0 =\frac{78A_0}{100}=0.78 A_0

0.78 A_0=A_0 e^{-0.03648t}

0.78 = e^{-0.03648t}

Again taking ln both sides,

\ln(0.78) = -0.03648t

-0.24846=-0.03648t

\implies t = \frac{0.24846}{0.03648}=6.81085\approx 7

Hence, approximately the substance would be 78% of its initial value after 7 years.

5 0
3 years ago
Find the value of Y [Inscribed Angle]
marshall27 [118]

Check the picture below.

3 0
3 years ago
Read 2 more answers
How do you work out miles in km​
never [62]

Answer:

1 km is 0.621371 mile  

Step-by-step explanation:

There are 1.609344 kilometers in 1 mile. To convert from miles to kilometers, multiply your figure by 1.609344 (or divide by 0.62137119223733) .

5 0
3 years ago
Read 2 more answers
Other questions:
  • Drag each equation show if it could be a correct first step to solving the equation. 4(3+x)=36.
    12·2 answers
  • Convert 0.39 to fraction
    8·2 answers
  • What is the length of AB?
    7·2 answers
  • Larson's beehive farm usually produces 85 pounds of honey per year. About how many pounds of honey will 10 to the 3rd power hive
    12·1 answer
  • There are five performers who will present their comedy acts this weekend at a comedy club. How many different ways are there to
    5·1 answer
  • Hi can you help ive tried so many way
    8·1 answer
  • 531 times what equals 5,310
    13·2 answers
  • I’m gonna be honest I can’t figure it out I need help
    14·2 answers
  • Find m the in this screenshot
    13·1 answer
  • PLEASE HELP! 14 POINTS AND PHOTOT ATTACHED!! A tower that is 103 feet tall cast to shadow 120 feet long. Find the angle of eleva
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!