Mathematics High School

The half-life of iodine-131 is approximately 8 days. Find the amount of iodine-131 left from a 35 gram sample after 32 days.

Answers

Answer 1

Answer:

2.1875 grams

Step-by-step explanation:

32/8=4 times it will divide 1/2

35/2=17.5

17.5/2=8.75

8.75/2=4.375

4.375/2=2.1875

Related Questions

(GIVING BRAINLIEST AND 12 POINTS) Gabe bought three watermelons for $12. How much would it cost to buy five watermelons?

Answers

Answer:

20 dollars

Step-by-step explanation:

i am smart

Answer:

20$

Step-by-step explanation:

12÷3=4

1 watermelon=4$

5x4= 20$

Need help with math pls help me will mark brainiest.

Answers

Answer:

The slope is [tex]\frac{-1}{3}[/tex].

Step-by-step explanation:

Math Vocabulary            Values

Vertical Change                 -1

Horizontal Change             3

Slope                                   [tex]\frac{-1}{3}[/tex]

Michael is buying new shirts and pants for school. He bought shirts for $38 each and pants for $38 each. He purchased nine items and spent a total of $222. How many shirts did he buy?

Answers

Answer:

No possible solution

Step-by-step explanation:

Let:

Shirt = x

Pant = y

x + y = 9 - - - - - - - - - (1)

38x + 38y = 222 - - - (2)

From (1):

y = 9 - x

Put y = 9 - x in (2)

38x + 38(9 - x) = 222

38x + 342 - 38x = 222

Based on the Given parameters, we can conclude that the equation does not have a possible solution.

Carol is mixing pink paint. The ratio of red to white paint is 2:1. If carol uses 6 parts red paint. How much white paint does she need?

Answers

Answer:

3 parts

Step-by-step explanation:

This is just ratios. We know that red paint:white paint is equal to 2:1. Therefore we just have to substitute the values in.

Red paint = 6, so

6: White paint (=1)

Meaning that all we have to do is divide 6 by 2 (to find the value of one part), giving us 3 parts.

There are 200 apples and then your mother takes away 100 how many are there?


VERY HARD FOR ME GUYS

Answers

Answer:

100

Step-by-step explanation:

200 - 100 = 100

hope this helps...

what is the value of (f – 9)(144)?

Answers

Use distributive property

144(f-9)

144f- (144•9)

144f-1296

Due in 11 minutes please help me ASAP

Answers

Answer: (d)

Step-by-step explanation:

Given

No of tickets sold can be given by the equation

[tex]35x-260>1000[/tex]

Solving inequality

adding 260 on both sides

[tex]35x-260+260>1000+260\\35x>1260[/tex]

Now, divide the inequality by 35

[tex]x>\frac{1260}{35}\\x>36[/tex]

Thus artist need to sell a minimum of 37 tickets to earn more than $1000

Determine whether the triangles are similar. or not.
If similar, state how.

A. similar, AA
B. similar, sss
C. Similar, SAS
D. Not similar

Answers

Answer:

A. SIMILAR, AA

Step-by-step explanation:

ABE = DBC

AEB = BCD

5
(
1
2
y + 5 ) −
4
5
=
1
2
y − 1 +
1
10
y

Answers

Answer:

question no proper plz give question in right way

(x) = 3х + 7
g(x) 2x + 12

Answers

what are you trying to do with this/solve for?

how do you get -11.9 from -6.7+(-5.2)

and explain in words how

Answers

If you just type that exact equation into a calculator it gives you the same answer as well

Answer:

You get -11.9 from -6.7+(-5.2) because you are adding 2 negative numbers. Just forget the negative signs are there when your adding negatives. 6.7 + 5.2 = 11.9 and then just add the negative in front and that's how you get your answer -11.9

Hope this helped!

What is the sum of 8 yards and 5 feet?

10 yards
13 yards
21 feet
29 feet

Answers

8 yards = 24 feet
24+5= 29


3. Match each vocabulary word to the picture.
A Linear pair
B. Vertical Angles
C Angle Bisector
D. Parallel Lines
E Orthocenter
F. Centroid

Answers

Answer:

correct

Step-by-step explanation:

Answer:

p1 = F

p2 = D

p3 = B

p4 = A

p5 = E

p6 = C

Step-by-step explanation:

just took the test and got it right

1/3x 6,000
helppp barely learning these

Answers

Answer:

2000

Step-by-step explanation:

6000 / 3 = 2000

Answer:

2000

Step-by-step explanation:

my answer has to be 20 characters long.

17. If a + b = c, which of the following statements is true?
A b - c = a
B a - c = b
C c-a = b
D c + b = a.

Answers

Answer:

c: c-a = b

.................

Answer:

c ...........................

Whats the value of x ?

Answers

I'm not sure but I think is 30

y=(x-2)+1 (convert into slope intercept form)

Answers

Answer:

I believe your answer is y=x-1.

Step-by-step explanation:

I hope this helps you!

Which fraction is equivalent to 4/8

Answers

Answer:

2/4

Step-by-step explanation:

It would be 1/2 there’s also other fractions but one of them is 1/2

Complete the table so a linear function is represented. SHOW ALL WORK!

Answers

Answer:

g

Step-by-step explanation:

Please help due in 10 minutes

Answers

Answer:

C. 4

Step-by-step explanation:

Let the number be "x".

3(x - 7) = -9

[3(x - 7)]/3 = -9/3

x - 7 = -3

x - 7 + 7 = -3 + 7

x = 4

Hope this helped! <3

The manger of a summer camp has 14 baseballs and 23 tennis balls.The manger buys some boxes of baseballs with 12 baseballs to a box and equal number boxes of tennis balls with 16 tennis balls to a box.Write an expression to represent the total number of balls.

Answers

Answer:

12x+16y+37

Step-by-step explanation:

14+23=37, and because we don't know how many boxes are bought, the variables mean that it is undetermined. You can plug any number in, nd it will work.

write an equation in point slope form for the line through the given point and given slope ( -7 , 9) ; m = 4/5

Answers

y = 4/5x + 73/5 is an equation

Twenty students bought tickets for a school party. All of the money received for these 20 tickets was used to purchase beverages. Then, an additional 10 students bought tickets. Rather than use this additional money to buy more refreshments, all 30 students received a $3.00 refund. How many dollars were used to buy beverages?

Answers

Answer:

$87

Step-by-step explanation:

How many acute angles are in a right triangle

Answers

Answer:

there are 2 a cute angles in a triangle

Which piece of information is pull prove a parallelogram is not a rectangle

A. The diagonals are congruent

B. Of the angles, 2 measure 100, and 2 measure 80

C. The consecutive angles are supplementary

D. The opposite sides are congruent

Answers

Answer:

D. The opposite sides are congruent

Please helppppppp!!!!

Answers

Answer:

I am not sure if i am correct Buttttt

Step-by-step explanation:

25:180

Answer:

I'm pretty sure it's (180, 1.5) (120, 3.5)

Step-by-step explanation:

I don't think that is right but maybe because it's the coordinates for the two points

is the square root of 2/5 an irrational number?

Answers

Answer: no, it is rational

Answer and Step-by-step explanation:

No, the square root of [tex]\frac{2}{5}[/tex] is NOT IRRATIONAL. That means it IS rational.

Since [tex]\frac{2}{5}[/tex] is a rational, positive number, squaring the number will still make it rational.

The square root of [tex]\frac{2}{5}[/tex] is [tex]\frac{\sqrt{10} }{5} , or///0.632455532[/tex]

#teamtrees #WAP (Water And Plant)

I need help finding the perimeter

Answers

Answer:

2c

Step-by-step explanation:

you do the math and subtract both answers

Solve for x:
3(x - 2)= -9

I NEED TO KNOW HOW TO DO THE WORK FOR IT!!

PLEASE URGENT WILL GIVE BRAINELES WORK ONLY FOR IT PLS

Answers

Answer:

3 × X = 3x

3 × -2 = -6

3x - 6 = -9

-9 + 6 = -3

3x= -3

x= -1

Answer:

x=-1

Step-by-step explanation:

3(x-2)=-9

3x-6=-9

3x-6+6=-9+6

3x=-3

3x = -3

3       3

x=-1

. What is 6 8ths x 5? Draw a model of your choice to help

Answers

Answer:

3.75 in decimal form.

Step-by-step explanation:

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