Cesium-137 has a half-life of 30 years. Find the
amount of cesium-137 left from a 100 milligram
sample after 180 years.

Answer:

245x^2+2520x^2−2175x−2750

Step-by-step explanation:

=((7x−10)(7x+5))(5x+55)

=((7x−10)(7x+5))(5x)+((7x−10)(7x+5))(55)

=245x^3−175x^2−250x+2695x^2−1925x−2750

=245x^2+2520x^2−2175x−2750

Hope it helps :)

Answer:

please give me brainlist and follow

Step-by-step explanation:

1/10 of 1 m = 10 cm.

Answer:

the answer is 6 for 5+1

Step-by-step explanation:

thanks :)

Answer:

50.80 cm^3

Step-by-step explanation:

the polyhedron is a rectangular pyramid

Volume of a rectangular pyramid = 1/3 x ( width x height x length)

1/3 ( 4 x 5 x 3) = 20 inches

we need to convert inches to cm

1 in = 2.54 cm

20 x 2.54 = 50.80 cm^3

Answer:

Less than

Step-by-step explanation:

The span of student ones box plot is going farther in the negatives then student two

Answer:

less than

Step-by-step explanation:

student 1 is 64 and student 2 is 65

Answer:

C, (–7.5, –5)

Step-by-step explanation:

Answer:

76+2x=90

2x=90-76

2x=14

x=14/2

x=7

Answer:

i think 88 sorry for puting under answer because i thin k ti's the answer and i dont get the question so i tried on a pieace of paper and i go this 88

Step-by-step explanation:

i think 88 sorry for puting under answer because i thin k ti's the answer and i dont get the question so i tried on a pieace of paper and i go this 88

Answer:

72

Step-by-step explanation:

hope it helps

i tried tp compute it on a piece of paper and 72 is the result

9514 1404 393

Answer:

  no

Step-by-step explanation:

It is close, but not exactly a right triangle.

If it were a right triangle, we would have ...

  21² +70² = 73²

We have instead ...

  441 +4900 ≠ 5329

  5341 ≠ 5329 . . . . . . . . not a right triangle

Answer:

B!

Step-by-step explanation:

the sample space is basically just a list of every possible out come that could happen. in this case it is just the numbers the spinner could hit in one spin!

Answer:

The answer is B!

Step-by-step explanation:

0_____________________________________0

The face says brainliest please!

Answer:

1) n = 24

2) m = 18

3) x = 15

4) m = 30

y = 3

m = 2

k = 45

x = 4

k = 80

Step-by-step explanation:

Brainliest pls

Answer:

Sorry I dont have time to put all the answers but here is the answers for 1-4

1. n=24

n-8=16

using opposite rule

n=16+8

n=26

2. m=18

2m=36

opposite rule

m=36÷2

m=18

3. x=15

x+5=20

opposite rule

x=20-5

4. m=30

[tex] \frac{m}{5} = 6[/tex]

m=6×5

m=30

Answer:

from what i can see, your correct. its the last one.

Step-by-step explanation:

hope this helps and please give brainly

Answer:

Step-by-step explanation:

im not sure if it is right,but here is my thought since its gonna be half first you do the 4x2x2=16 divide 16 by 2 witch will give you have of 16 witch will also give you 8

Answer:

Population = number of children in gymnastic class = 5

Parameter = mean number of steps taken by the 5 children

Step-by-step explanation:

The population could simply be referred to as the total number or set of similar objects or subjects related to a certain study or research. In the scenario described above, the area of interest is a particular gymnastic class, therefore all individuals or children belonging to this particular gymnastic class makes up the population.

Parameter on the other hand are statistical metrics, values or calculations derived from the population figure or information. Here, the mean value of steps obtained from the step counts of the population data is called the parameter.

Population is number of children in gymnastic class = 5.

Parameter is mean number of steps taken by the 5 children.

Given that,

Suppose that there are 5 children in a gymnastics class.

One day, they count the number of steps each person takes while walking on their hands until they lose balance and come down.

The mean number of steps these children took while walking on their hands is 20 steps.

We have to Identify,

The population and parameter.

According to the question,

Parameters are descriptive measures of an entire population. However, their values are usually unknown because it is infeasible to measure an entire population. Because of this, you can take a random sample from the population to obtain parameter estimates.

The population could simply be referred to as the total number or set of similar objects or subjects related to a certain study or research.

The scenario described above, the area of interest is a particular gymnastic class, therefore all individuals or children belonging to this particular gymnastic class makes up the population.

Parameter on the other hand are statistical metrics, values or calculations derived from the population figure or information.

Here, the mean value of steps obtained from the step counts of the population data is called the parameter.

A parameter is a value that describes a characteristic of an entire population, such as the population mean.

The population mean and standard deviation are two common parameters.

Hence, Population = number of children in gymnastic class = 5.

Parameter = mean number of steps taken by the 5 children.

To know more about Probability click the link given below.

https://brainly.com/question/23135833

Answer:

Step-by-step explanation:

Fist we multiply the values:

2*4y-2*1=6

8y-2=6

8y=6+2

8y=8

y=8:8

y=1

Answer:

x = 6.44 cm

Step-by-step explanation:

Given that,

Volume, V = 147π in³

Height, h = 9 cm = 3.54 in

We need to find the value of x. The formula of this polyhedron is given by :

[tex]V=\pi r^2 h\\\\r=\sqrt{\dfrac{V}{\pi h}} \\\\r=\sqrt{\dfrac{147\pi }{\pi \times 3.54}} \\\\r=6.44\ in[/tex]

or

r = 16.35 cm

So, the value of x is equal to 6.44 cm.

Answer: 21

Step-by-step explanation:

Ok so first of all the numbers in the parentheses go first.

So 6 to the power of 2 (6^2) would be 6x6 which equals 36

50-36=14

After that you just keep rewriting the problem after every step.

Since the 3 is outside of the parentheses, you would multiply it with the 14

3x14=42

Finally 42÷ 2=21

3x (50 - 6^2) ÷ 2 =

        3(14)÷ 2

           42÷ 2= 21

Hope this helps (:

Btw sorry if it's a bit confusing but the answer is 21

Answer:

131

Step-by-step explanation:

15/80 = x/700

80x = 10,500

x = 131.25

you cannot have 0.25 of a person so you must round down to the nearest integer

Answer:12/15

Step-by-step explanation: first you add 7+5=12

then add 12+3=15

Answer:

mad- 8.9796

iqr- 15

q1- 88

q2- 92

q3- 103

minimum- 85

maximum- 120

Step-by-step explanation:

the explanation is the picture **sorry i couldn't help with the dot plot**

good luck :)

i hope this helps

brainliest would be highly appreciated

have a nice day!

Answer:

0.54035

Step-by-step explanation:

Given that :

Mean, m = 66 inches

Standard deviation, s = 2.5 inches

P(65 < X < 69)

P(X < 69) - P(X < 65)

((69 - 66) / 2.5) - ((65 - 66) / 2.5)

P(Z <(3/ 2.5)) - P(Z <(-1 / 2.5))

P(Z < 1.2) - P(Z < - 0.4)

0.88493 - 0.34458

= 0.54035

Answer:

The original price of the parrot was $16.8

Step-by-step explanation:

Hoped this helped :)

Answer:

Just look this up and you shall get the answer:)

Step-by-step explanation:

Answer:

f(0) = 31

Step-by-step explanation:

We are given the following function:

[tex]f(x) = \sqrt{7x} + 31[/tex]

f(0).

This is the value of f when [tex]x = 0[/tex]. So

[tex]f(0) = \sqrt{7*0} + 31 = \sqrt{0} + 31 = 0 + 31 = 31[/tex]

So f(0) = 31

Answer:

[tex]h = \frac{v}{\pi r^{2} }[/tex]

Step-by-step explanation:

Answer:

b I think. I think so yeah

A circle is formed when a cone intersects a plane as shown in the drawing.

A circle is a shape consisting of all points in a plane that are given the same distance from a given point called the center.

A cross section is defined as the process where a surface is shown when a straight cut is made by something. We are given when a cone is intersected by a plane horizontally the shape of the cross - section is a circle .

When the cone is intersected vertically by a plane the shape of the cross- section will be a triangle. Hence the shape of the cross section depends according to the cut.

Cross section is usually used to find what is there inside the object.

Learn more about circle;

https://brainly.com/question/15380197

#SPJ7

Answer:

D. 2,280 cm²

Step-by-step explanation:

Surface area of triangular prism = bh + (S1 + S2 + S3)*L

Where,

b = 24 cm

h = 10 cm

S1 = 26 cm

S2 = 24 cm

S3 = 10 cm

L = 34 cm

Plug in the values

Surface area = 24*10 + (26 + 24 + 10)*34

= 240 + 2,040

= 2,280 cm²