a mine worker discovers an ore sample containing 500mg of radioactive material. it is discovered that the radioactive material has a half life of 1 day. find the amount of radioactive material in the sample at the beginning of the 7th day.

Answers:

21.75

1.37

10

15

Step-by-step:

Dozen flyers:price

4:7.25

12:x

To solve this mulitply 7.25 by 3 (because this is what we multiplied 4 by to get 12) 7.25*3=21.75

Question 2:

We can write teh following equation

.49+.22(x-1)=price

This is essentially saying that we pay .49 for the first ounce and .22 for every ounce after that

We can plug in an x value to get

.49+.22(5-1)

.49+.22(4)

.49+.88

1.37

Question 3:

We can write the following equation

x+2=y

We need to find out what happens when x=8

8+2=10

Question 4:

We can solve this with ratios

x:y

1.5:4.5

5:x

To solve just multiply 4.5 by 10/3 and get 15

We can just multiply

Answer:

1. 7.25/4=1.8125 so 1.8125x12=21.75

2. 0.49+(0.22x4)=1.37

3. rule is x+2=y so x=8 then y=10

4.rule is 3(x)=y so x=5 then y=15

Answer:

x = 1

Step-by-step explanation:

18 - 7x = 3 + 8x

-18        -18

-7x = -15 + 8x

-8x          -8x

-15x (÷ -15) = -15 (÷ -15)

x = 1

Answer:

x = 1

Step-by-step explanation:

18 = 3 + 15 x

15 = 15x

x = 1

PLUG IN THE 1 TO CHECK:

18 - 7 = 11

3 + 8 = 11

11 = 11

x represents the number of weeks he has been saving.

y is the total money in his account.

The slope is $15

The y intercept is 35

For the table

X:0 and y: 35, x:1 y:50, x:2 y:65, x:3 y:80 x:4 y:95 , x:5 y:110 ,

This table is not proportional because the equation you have has a y intercept and for it to proportional it has to be written as y=mx not as y=Mx+b

Answer:

Lisa earns more money because John makes $16 while Lisa makes $18.

Answer:

you have to divide then subtract in order to find the answer

Step-by-step explanation:

Answer:

its >

Step-by-step explanation:

when I was in school the bars ment it will become the opposite of the number inside so that means -90 will become 90

Answer:

90>70

Step-by-step explanation:

the ones in the lines r always even

Sophia's polygon is, ''5 - sided polygon'' or ''Pentagon.''

Any triangle is a three sided polygon, which has three vertices and three angles which has the sum 180 degrees.

We have to given that;

The minimum number of triangles needed to construct the polygon Sophia made is 3.

And, To find Sophia's polygon.

Now, We know that;

The Shape of Pentagon is made with 3 triangles.

Hence, Sophia's polygon is known as,

⇒ 5 - sided polygon or Pentagon.

Therefore, We get;

⇒ The polygon make by Sophia's is, Pentagon.

Learn more about the rectangle visit:

brainly.com/question/2607596

#SPJ3

Answer:

True

Step-by-step explanation:

Sana Makatulong Tama yan

Answer:

T

Step-by-step explanation:

Upper extreme is the highest number.

Hope this helps!

Answer:

20+2x-8

Step-by-step explanation:

I hope this help

Answer:

rhe surface area of the 27 square of prism

Answer:

area: 31.63ft perimeter: 21.71ft

Step-by-step explanation:

Divide this up into 2 right triangles and 2 semicircles

Area:

right triangles: 2(0.5(3)(4))= 12ft

semicircles: 2(0.5*π*2.5²)= 19.63ft

area of entire buttcheek: 12+19.63=31.63ft

Perimeter:

top: 6ft

arcs: 2(π*2.5)= 15.71ft

perimeter of entire buttcheek: 6+15.71=21.71ft

Answer:

i think you need start

Step-by-step explanation:

to multiplicate the numbers

Answer:

2

Step-by-step explanation:

are you siruous

Answer: 1+1 is a hard one i had to ask my mom but i think its 2 maby

Answer:

Step-by-step explanation:

Perimeter≈ 3.2+3.2+2+4

the answer is 12.4inches

Answer:

12.4 inches

Step-by-step explanation:

To find the perimeter, add up all the sides

P = 3.2+2+4+32.

P =12.4 inches

Dear Rebecca,

   Your answer will be 1/3.

                           Your friend,

                   Sophia Lavender

Answer:

The answer is 1,716.00

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

because yes

Answer:

A

Step-by-step explanation:

Good Luck

Answer:

Where is the area of the whole triangle tho-

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

1. 11   ( (3x2) + 5)

2. 16 ( (3x2) + (2x5) )

3. 19  ( (3x5) + (2x2) )

4. 54 ( ( 10x2) + (4x5) + (7x2) )

5. 50  ( (8x5) + (5x2) )

6. 34   ( (7x5) + (4x5) )

Hope I got all them correct!

Step-by-step explanation:

firstly draw the triangle and label it. (you will find the picture down)

Now this remind us with the cosine rule. (you will find the picture down)

This rule says that the square of the given length of the side of a triangle is equal to the sum of the squares of the length of other sides minus twice their product and multiplied by the cosine of their included angle.

So using that rule we can say that:

[tex]QS^{2}[/tex] = [tex]QR^{2} +SR^{2} - 2(QR)(SR)(cosR)[/tex]

square root both sides, so you will have QS alone in one side.

QS = [tex]\sqrt{ [QR^{2} +SR^{2} - 2(QR)(SR)(cosR)]}[/tex]

plug in the values we have and y=this will yield:

QS = [tex]\sqrt{ [11^{2} +16^{2} - 2(11)(16)(cos38)] }[/tex] = 9.98099267 = 10

Answer:

136

Step-by-step explanation:

the smallest number is 136

Answer:

1/4

Step-by-step explanation:

Answer:

1/4

Step-by-step explanation:

got it right on test

7x11 Is 77 and 89 - 77 equals 12 so 12 pairs of jeans would be left over.

Answer:

C= 7y +150

850

250

Step-by-step explanation:

The cost is 7 times y, the number of yearbooks, plus 150, the upfront cost.

7 times 100 is 700, plus 150 is 850.

1900-150 is 1750 divided by 7 is 250

Answer:

c

Step-by-step explanation:

Answer:

Blank 1: higher

Blank 2: half

Blank 3: not study

Step-by-step explanation:

I don't know 100% that the middle one is correct, but I know for sure the other two are.

Answer:

1- Higher

2- Twice

3- Did not study

Step-by-step explanation: