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
Vsevolod [243]
3 years ago
6

It has been estimated that 1000 curies of a radioactive substance introduced at a point on the surface of the open sea would spr

ead over an area of 40,000 km2 in 40 days. Assuming that the area covered by the radioactive substance is a linear function of time t and is always circular in shape, express the radius r of the contamination in terms of t.
Mathematics
1 answer:
Zanzabum3 years ago
8 0
<span>1000 meters per second is the answer 

radius =25.23Km

(t)= days 

</span>
You might be interested in
Need help finding slope, x-intercept, and y-intercept
butalik [34]

Step-by-step explanation:

count the slope, 5 up in 2.5 horizontal steps, slope = 5/2.5 or 2

x intercept is on the graph, 2.5

y intercept is also on the graph, -5

8 0
2 years ago
Read 2 more answers
Lia must work at least 5 hours per week in her family’s restaurant for $8 per hour. She also does yard work for $12 per hour. Li
Fittoniya [83]

Answer:

(a)

r\geq  5

r+y\leq 15

8r+12y\geq 120

y\geq 0

(c)Maximum number of hours Lia can work at the restaurant and still meet her earnings goal = 15 hours

(d)Maximum Earning = $160

Step-by-step explanation:

Let r be the number of hours worked at the restaurant.

Let y be the number of hours of yard work,

Lia must work at least 5 hours per week in her family’s restaurant for $8 per hour.

r\geq  5

Since she does yard work, y\geq 0

Lia’s parents allow her to work a maximum of 15 hours per week overall.

r+y\leq 15

Lia’s goal is to earn at least $120 per week.

The restaurant, r pays $8 per hour

Yard work, y pays $12 per hour.

Therefore:

8r+12y\geq 120

The system of inequalities that represent this problem is therefore:

r\geq  5

r+y\leq 15

8r+12y\geq 120

y\geq 0

(b)The graph of the inequality is attached below

(c)When the graph is plotted, the vertices of the feasible region are:

  • (5,10)
  • (5, 6.7)
  • (15,0)

Where the first term is for the number of hours worked in the restaurant.

The maximum value of r possible is 15 from the three points.

Therefore, she can work at the restaurant for 15 hours and still meet her earning goal.

(d)Maximum Amount Lia can earn in 1 Week

  • At (5,10), Earning=(5X8)+(10X12)=40+120=$160
  • At (5, 6.7), Earning=(5X8)+(6.7X12)=40+80.4=$120.4
  • At (15,0) Earning=(15X8)+(0X12)=$120

Since she has to work at least 5 hours at the restaurant, the maximum amount possible is $160.

8 0
3 years ago
A sixth grade class has 12 boys and 24 girls. Q: For every 2 boys, there are 4 girls, do you agree with this statement? Explain
dimaraw [331]
Agree....There are 12 boys and every 2 = 6 groups  6x2
   There are 24 girls and every 4 to the 2 =6 groups  6x4


7 0
3 years ago
Read 2 more answers
Can anyone solve this??????<br> ( -5v–2)–( -9v–1)
tatyana61 [14]
( -5v-2)-( -9v-1) \\ \\ -5v - 2 + 9v + 1 \ / \ simplify \\ \\ (-5v + 9v) - 2 + 1 \ / \ combine \ like \ terms \\ \\ 4v - 2 + 1 \ / \ simplify \\ \\ 4v - 1 \ / \ simplify \\ \\ Answer: \fbox {4v - 1}
6 0
3 years ago
Read 2 more answers
If you have 3/4 cups of flour how many eighths do you have
Shtirlitz [24]
Just do 3/4 divided by 1/8 - answer should be 6
7 0
3 years ago
Other questions:
  • What is 52 divided by 8 incluing remainder?
    14·1 answer
  • What are the factors of x2 − 64?
    15·1 answer
  • Find the width of a cereal box that has a volume of 2,112 cm^3 and is 22 cm long and 24 cm high.
    10·1 answer
  • MATH what is 9x1 9x2 9x3 9x4 9x5 9x6 9x7 9x8 9x9 9x10<br><br><br><br> EASY MATH 10 POINT
    12·2 answers
  • If the sum of a number and 4 are doubled the result is two less than the number what's the number
    11·1 answer
  • I have been asking for assistance for an hour and a half now, I will greaty appreciate anyone that can help with this..Find the
    11·1 answer
  • Ned started the month with $137.06 in his bank account. Over the course of the month he got 2 paychecks. One for $286.77 and the
    10·1 answer
  • tom and jane want to build a round swimming pool in their backyard that is 20 feet across . how many square feet will the pool b
    15·1 answer
  • Help me with this homework
    7·2 answers
  • 2. Patrick worked 5.25 hours on Monday,
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!