A sample of a radioactive isotope had an initial mass of 730 mg in the year 2000 and
decays exponentially over time. A measurement in the year 2002 found that the
sample's mass had decayed to 510 mg. What would be the expected mass of the
sample in the year 2011, to the nearest whole number?

Answers

Answer 1

Answer:

102

Step-by-step explanation:


Related Questions

Find the value of x :)

Answers

Answer:

x = 20

Step-by-step explanation:

→ Remember how many degrees are on a straight line

180°

→ Set up an equation

2x + 70 + 3x + 10 = 180

→ Simplify

5x + 80 = 180

→ Minus 80 from both sides

5x = 100

→ Divide both sides by 5

x = 20

Answer:

x=20

Step-by-step explanation:

Those add up to 180 degrees because a straight line is 180 degrees

Equation

2x + 70 + 3x + 10 = 180

Add liked terms

2x+3x=5x

5x+80=180

5x+80-80=180-80

Divide both sides by 5

5x=100

x=20

hope this helps and good luck! <3

Would greatly appreciate the help

Answers

Answer:

B

Step-by-step explanation:

1.454, 1.454444, 1.454454454, 1.4545454, 1.454545 in order but as you can see, the last two are equal

How many three digit numbers can you get by arranging the numbers 5, 6,
7, 8, 3, 4, 5, 6, 7, 8, 9?

Answers

Answer:

84 numbers

Step-by-step explanation:

Numbers starting with 12 – 7 numbers

Numbers starting with 13 – 6 numbers;

14 – 5, 15 – 4, 16 – 3, 17 – 2, 18 – 1.

Thus total number of

numbers starting from 1 is given by the sum of 1 to 7 = 28.

Number of numbers starting from 2- would be given by the sum of 1 to 6 = 21

Number of numbers starting from 3- sum of 1 to 5 = 15

Number of numbers starting from 4 – sum of 1 to 4 = 10

Number of numbers starting from 5 – sum of 1 to 3 = 6

Number of numbers starting from 6 = 1 + 2 = 3

Number of numbers starting from 7 = 1

Thus a total of: 28 + 21 + 15 + 10 + 6 + 3 + 1 = 84 such numbers.

Need help on this please asap.

Answers

Answer:

This is confusing

Step-by-step explanation:


Find the volume. Round to the nearest tenth if necessary.

Answers

Answer:

1,440

Step-by-step explanation:

When you find the volume, you have to multiply all the numbers.

So in this case:

10*12*12 = 1,440

20 points Please help me match the equation with the method ty

Answers

Answer:

a. Substitution method.

b. Elimination method.

c. Graph method.

Step-by-step explanation:

Given the following algebraic expressions;

a. y = 3x + 10 ....... equation 1

2x - 4y = -6 ...... equation 2

The above would be solved using substitution method.

Substituting eqn 1 into eqn 2, we have;

2x - 4(3x + 10) = -6

2x - 12x - 40 = -6

-10x = -6 + 40

-10x = 34

x = 34/10

x = 3.4

y = 3x + 10 = 3*3.4 + 10

y = 10.2 + 10 = 20.2

b. 9x + 2y = 29 ...... equation 1

3x - 2y = -17 ...... equation 2

The above would be solved using elimination method.

Adding eqn 1 to eqn 2, we have;

(9x + 3x) + (2y + (-2y)) = (29 + (-17))

12x + 0 = 12

12x = 12

x = 12/12 = 1

To find y, from eqn 1;

9(1) + 2y = 29

2y = 29 - 9

2y = 20

y = 20/2 = 10

c. y = 3/2x - 5

y = 2x + 8

The above would be solved using a graph method.

You choose a range for the value of y and x. These values are then plotted against each other and the slope of the graph is determined.

Jeremy homeowners policy has a face value of 56,400 and a 750 deductible. How much will the insurance pay on a a 1,612 loss

Answers

Answer: 862

Step-by-step explanation:

A deductible refers to the amount of money that one will have to pay himself or herself toward an insured loss.

It should be noted that when a disaster occurs, the amount of the deductible will be subtracted from the loss. Since the loss is 1612 and the deductible is 750, the insurance company will pay:

= 1612 - 750

= 862

A man is in the 33% tax bracket and itemizes his deductions how much will his tax bill be reduced if he qualifies for $1400 tax credit?

Answers

Step-by-step explanation:

[tex] = 33\% \times 1400 \\ = \frac{33}{100} \times 1400 \\ = 462 \: dollars \\ remaining \: tax = 1400 - 462 \\ = 938 \: dollars[/tex]

Jelpppsldkdhjdisjsjxjxjzjdjz

Answers

Answer:

28716.35 mm³

Step-by-step explanation:

The formula of volume of sphere

[tex] = \frac{4}{3} \pi {r}^{3}[/tex]

The volume of the sphere

[tex] = \frac{4}{3} \times 3.14 \times {(38 \div 2)}^{3} [/tex]

[tex] = \frac{4}{3} \times 3.14 \times {19}^{3} [/tex]

[tex] = \frac{86149.04}{3} [/tex]

[tex] = 28716.34667...[/tex]

= 28716.35 mm³ (rounded to the nearest hundredth)

Mingfa says, "My sister and I have $130 altogether. If my mother gives me another
$10, I'll have 3 times as much money as my sister."
How much money does Mingfa actually have?​

Answers

Given:

Total amount of Mingfa and her sister = $130

If Mingfa amount increased by $10, then the new amount is equal to three times of as much money as her sister.

To find:

How much money does Mingfa actually have?​

Solution:

Let, Mingfa have $x and her sister has $y initially. Then,

[tex]x+y=130[/tex]                ...(i)

If Mingfa amount increased by $10, then the new amount is equal to three times of as much money as her sister.

[tex]x+10=3y[/tex]              ...(ii)

Substitute the value of x from (ii) in (i).

[tex](3y-10)+y=130[/tex]

[tex]4y=130+10[/tex]

[tex]4y=140[/tex]

Divide both sides by 4.

[tex]y=35[/tex]

Putting [tex]y=35[/tex] in (i), we get

[tex]x+35=130[/tex]

[tex]x=130-35[/tex]

[tex]x=95[/tex]

Therefore, Mingfa have $95.

If x= 10 which lines are parallel? Check all that apply. (8x - 25) b (12x - 5) (7x - 5) (10x + 15) a​

Answers

Answer:

150 A

Step-by-step explanation:

THIS THE ANSWER

I HOPE IT HELPS

Do as the question asks. I promise I will award a brainliest answer :)

Answers

1st picture is a PENTAGON

2nd picture is a OCTAGON

3rd picture is a HEPTAGON

Answer:

Step-by-step explanation:

hope this helps! :)

if y varies inversely as x and y=3 when x=14, find x when y=6​

Answers

X=7 What you can do is look at the first two values given, and make them x1 and y1. Then your next value here is y2.

So x1 is 14, and y1 is 3. y2 becomes 6. X2 is unknown.

Then make the formula: x1/y2 is equal to x2/y1
(You are setting two fractions equal to each other)

That makes 14/6=X/3. When we cross multiply, we find that x=7.

Mr. Meadows has a 6 and a 1/2 gallon bucket. His dipping can hold one and a 1/2 gallons. 3 times this year to dip into the pond with the dipping can to fill the bucket to the top

Answers

Answer:4

Step-by-step explanation:

u = 63 cm, t = 34 cm and ∠T=158°. Find all possible values of ∠U, to the nearest 10th of a degree.

Answers

Answer:

{}

Step-by-step explanation:

Thats actually the answer believe it or not :)

HELP! what is the unit rate???

Answers

the unit rate for that equation is .33

Answer: The unit rate of the bananas is 0.33$

Step-by-step explanation:

1.98/6 = 0.33$ . 0.33 x 6 = 1.98$

In ΔGHI, the measure of ∠I=90°, IH = 84, GI = 13, and HG = 85. What ratio represents the tangent of ∠H?

Answers

9514 1404 393

Answer:

  13/84

Step-by-step explanation:

The relevant trig ratio is ...

  Tan = Opposite/Adjacent

  tan(H) = GI/HI

  tan(H) = 13/84


what 21•92+10.
100 points if you answer

Answers

Answer:

1942

Step-by-step explanation:

Since their is multiplication and addition you need to remember the order of operations. Also remember that the dot · is another multiplication symbol.

[tex]21*92=1932[/tex]

Now add 10

[tex]1932+10=1942[/tex]

1942 is the final answer

what is the mean of 4, 8, and 18​

Answers

Answer:

10

Step-by-step explanation:

to find the mean/average you add the numbers together and divide by how many numbers there are, for example you add 4 and 8 and 12 which equals 30 and you divide that by 3 becuase there are three numbers  (4,8,12) which gives you 10.

Factor out the greatest common factor from 4x2−36x

Answers

Answer:

4x

Step-by-step explanation:

Given the expression

4x² - 36x

Get the individual factor of each terms

4x² = 4 * x * x

36x  = 4 * 9 * x

4x² - 36x = 4x(x-9)

From both factors we can see that 4*x is common to them, hence the greatest common factor is 4x

Which figure is an example of perpendicular lines?

Answers

Answer:

what school do you have

Step-by-step explanation:

A box contains 4 bags of flour. The total mass of all 4 bags is 8kg. What is the mass of each bag in cg?

Answers

The mass of each bag is 2 kg. To find this, just divide 8kg by 4 bags. Hope this helps!

Plz help this is due today i would have done it myself but i totally forgot about these so PLZ HELP AND NO LINKS AND NO GROSS PICTURES OR I REPORT

Answers

Answer:

b)

Step-by-step explanation:

lol ;)

Answer:

a i hoped i helped

Step-by-step explanation:

can you help me with this question i will give 40 points?

Answers

i think 21 or 22 not sure

Mr. Cooper purchased a night stand
at the furniture store. It came in a
rectangular-prism-shaped box. The
volume of the box is 31,050 cubic
inches. The box is 36 inches deep and
284 inches wide. What is the height of
the box?

Answers

Answer:

V = lwh

31050 = 36(28)w

31050 = 1008w

w = 31"

Step-by-step explanation:

This is ez lol

Help ASAP no links please

Answers

Answer:

[tex]x = 11/4[/tex]

Step-by-step explanation:

Given

[tex]1 + \sqrt{4x + 5} = 5[/tex]

Required

The solution

[tex]1 + \sqrt{4x + 5} = 5[/tex]

Collect like terms

[tex]\sqrt{4x + 5} = 5 - 1[/tex]

[tex]\sqrt{4x + 5} = 4[/tex]

Square both sides

[tex]4x + 5 = 16[/tex]

Collect like terms

[tex]4x = 11[/tex]

Divide both sides by 4

[tex]x = 11/4[/tex]

Jose wants to fence in his garden. The shape is a rectangle. Two sides are each 12 feet long. The other two sides are each 108 inches long. He buys 40 feet of fence.

Part A

What are steps he must take to see if he bought enough fence? Select all that apply.

A.
Convert both side lengths to the same unit.

B.
Find the area of the garden.

C.
Add 12 feet and 108 inches to find the perimeter of the garden.

D.
Compare the number of feet of fence he bought with the number of feet of fence he needs.

Part B

Did he buy enough fence?

A.
no

B.
yes

Answers

The answer is To your question is C

The steps to take to make sure he bought enough fence are

Covert both sides to the same units.Compare the number of feet of fence he bought with the number of feet of fence he needs

The perimeter of the rectangular fence is 42 feets.

Properties of a rectangle.Opposite sides are equal.Opposite sides are parallel.The angles are right angle.

Therefore, two sides of the garden are 12 feet each long. The other two sides are 108 inches long.

The steps to take to make sure he bought enough fence is as follows:

Covert both sides to the same units.Compare the number of feet of fence he bought with the number of feet of fence he needs.

Therefore,

108 inches = 9 ft

Therefore,

12 + 12 + 9 + 9 = 42 feet's.

He bought 40 feet fence. Therefore, he needs 42 feet's of fence which means the fencing will not be enough.

learn more on rectangle here: https://brainly.com/question/10612797

#SPJ2

What is the measure of angle R?
Enter your answer as a decimal in the box. Round only your
final answer to the nearest hundredth.
m_R=

Answers

Answer:

28.07°

Step-by-step explanation:

sin R = 8/17

arcsin R = 28.07

A quarter, nickel, and dime were tossed. What is the probability of getting at least two heads

Answers

Answer:

.38 probability of getting two heads

Step-by-step explanation:

Final Question!!!! College Math! I also did half of it!

Answers

Answer:

15π/4

9π /4

Step-by-step explanation:

[tex]5 \int\limits^4_1 {f(x)} \, dx[/tex]  = 5 ((-π/4)+ π) = 5 (π-π/4) = 5(3π/4) = 15π/4

[tex]5 \int\limits^6_1 {|f(x)|} \, dx[/tex] =  5(π/4 + 2π)  = 5(9π /4) = 45π/4

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