Mathematics Middle School

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

Answer 1

Answer:

The miner would have 3 1/2 of radioactive material in the sample at the beginning of the 7th day.

Step-by-step explanation:

hope this helped!

Answer 2
3 1/2 is radioactive hope this helps’

Related Questions

PLS HELP ME WITH THIS QUESTION

Answers

Answer:

z = 68º

Step-by-step explanation:

40º + 57º = 97º

180º - 97º = 83º

83º + 29º + z = 180º

112º + z = 180º

z = 180º - 112º

z = 68º

68 have an wonderful day

A store marks up a pair of sneakers 30%. Write the percent as a fraction or mixed number in simplest form.

Answers

Answer: 9/36

Step-by-step explanation:

30% as a fraction is 3/10.

I'LL GIVE BRAINLIEST

A or D

Answers

Answer:

A

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Can someone help me solve this?

Answers

The slope is 1/4

Figure it out by finding 2 points that are on lines, and do rise over run to get from one point to the other

BOOM

During bowling practice, Marley rolled 14 strikes out of 70 attempts. What percent of Marley’s attempts were strikes?
(if you answer this may you please show your work)

Answers

Answer:

no.

Step-by-step explanation:

the correct answer should be 20. what you do is divide 70/14 i think

divide 14 by 70 which is 0.2 and then multiply it by 100 to find the percentage, which is 20%

Solve the inequality 9/2 + v > 7/5

Answers

Answer:

the answer is -31/20

Step-by-step explanation:

:) please help its that time of day

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The answer is 540.. I think
Answer. The answer is 450

4-[2.5(5.4+2.6)-(-7.2)

Answers

-23.2 I think this is the answer

use the model to find each sum or difference.
Rename the fractions as equivalent fractions with like
denominators.
1 5/8 + 1 1/2 = ___

Answers

15+44/8 = 59/8 or 7.375
Just to help you out, download the app photomath, it gives you the explanation and answer !! (Shows you how to do it too) and the app is free!!

Please help look at the screenshot

Answers

Millimeters is the correct answer

i think its Grams (:

There are two unknowns you are trying to find, and you cannot express one in terms of the other. Describe how you could use algebra to solve for the unknowns.

Answers

Answer:

When you solve systems with two variables and therefore two equations, the ... of any variable is 1, which means you can easily solve for it in terms of the other ... In the substitution method, you use one equation to solve for one variable and ... Look for a variable with a coefficient of 1 … that's how you'll know where to begin.

Step-by-step explanation:

PLSS Help me find the area of that shape, ONLY ANSWER IF YOU KNOW THE ANSWER, BRAINLIEST!!!!!!!!!!

Answers

Answer:

.

Step-by-step explanation:

the whole thing is 48 and the part with the dotted line is 74 hope this helps you out

Answer:

area 122

Step-by-step explanation:

Please help me.
Eighty percent of the picture frame is glass. A photo shows a picture frame of length 10 and three-fourth inches and width 8 and one-half inches, hanging on the wall. The border of the frame is labeled molding. What is the area of the molding?

Answers

Answer:

91.4 inches

Step-by-step explanation:

I will leave the explanation in the comments.

The area of the moulding is; 18 and 11/40 square inches

What is the area of the rectangle?

The area of the rectangle is the product of the length and width of a given rectangle.

The area of the rectangle = length × Width

Here, we want to get the area of the moulding

we are given that the 80% of the frame is a glass photo

Means 20% of the picture frame will be that of the moulding.

By calculating 20% of the area of the frame, we get the area of the moulding;

43 /4 x 17/2 = 731/8

we have this as;

731/8  divided by 5

= 18 and 11/40 square inches

Learn more about the area;

https://brainly.com/question/1658516

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A set of speakers that originally sells for $225 is currently on sale for 20% off. How much does the set of speakers currently cost?

Answers

The speakers cost $180 currently. This is because 20% of 225 is 45 and 225 - 45 = 180. Hope this helps

Nadia is a stockbroker. She earns 12% commission each week. Last week, she sold $5400 worth of stocks. How much did she make last week in commission?If she averages that same amount each week, how much did she make in commission in 2011

Answers

Answer:

31312

Step-by-step explanation:

Tony's fish weighs five pounds more than three times the weight of Mary's fish use t for the weight of tony fish and use m for the weight of Mary's fish which expression best represents the weight of Tony's fish?​

Answers

Answer: it’s the second one

Step-by-step explanation: because if you look closely you see it’s adding

Answer: 1st one

Step-by-step explanation: Tony Fish times 3 +5 Mary Fish

Pls Help me:) Brailiest!

Answers

Answer:

15

Step-by-step explanation:

the answer is 15
step by step explanation

Graph each line. Give the slope-intercept form for all standard form equations.
y = 4x - 6
(Do this the intended way, get a piece of paper and solve it, don’t answer and say that you don’t know because that’s such a waste of my points and time)

Answers

Step-by-step explanation:

Also keep in mind the y intercept is -6. use desmos to try and graph your equations.

[tex]solve \\2x^2-7x+10-5+14x-7x-2x^2+ab-2ab+ba[/tex]

Answers

Answer:

(i) y − z

(ii)

(iii) z2

(iv)

(v) x2 + y2

(vi) 5 + 3 (mn)

(vii) 10 − yz

(viii) ab − (a + b)

Answer:

ab+5

Step-by-step explanation:

calculate the same terms one by one

On Saturday, Lukas drove 4x – 5 miles. On Sunday, he drove 3x – 10 miles. What is the difference in miles driven?

Answers

Step-by-step explanation:

4x-5-(3x-10)=4x-5-3x+10=x+5 miles! Hopes This Helps!

Answer:

4x-5-(3x-10)=4x-5-3x+10=x+5 miles

Step-by-step explanation:

i know because i did this

42 pointssssss!!! There are two unknowns you are trying to find, and you cannot express one in terms of the other. Describe how you could use algebra to solve for the unknowns.

Answers

you can use a formula like y=mx+b

Kat sold cell phones for $60. She increased the price by 100%. What is the new price of the cell phones?

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the new price would be $120
The new price is $120. 100% of $60 is $60, and because she increased by 100%, the answer is 60 (original price) +60 (price increase)

a pound of bananas costs $0.59 and a pound of cherries costs $3.98. What are the combined cost of 2.4 pounds of bananas and 1.8 pounds of cherries? Round your answer to the nearest cent.

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$8.58 -I hope this helped-

Please help ASAP! Thank u

Answers

Answer:

10

Step-by-step explanation:

A to B = 3

B to C = 2

2+2+3+3= diez

The answer is 10 for your question

Complete the statement. Round to the nearest hundredth if necessary.

3 pt = (blank)c

Answers

3.17, because there are about 1.056 quarts in one liter.

1.056 times 3 = 3.168, which, rounded to the nearest hundredth, is 3.17.

hope this help :)

After rounding off the obtained value, the value obtained in quarts will be equal to 3.17 qt.

What is rounding off values?

The act of simplifying a number so that its value remains near to what it was is known as rounding. The outcome of rounding off a figure is less precise but simpler to utilize. They directly involve if a number's digits are taken into account while rounding it.

As per the given information in the question,

As we know,

1 liter = 1.057 quarts

Then, the number of quarts in 3 L will be equal to,

3 × 1.057

= 3.171 ≈ 3.17 qt

To know more about rounding off values:

https://brainly.com/question/13391706

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This question seems incomplete, the complete question may be:

Complete the statement. Round to the nearest hundredth if necessary. 3 L ≈ qt

Brian and Steve want to compare the prices of their favorite cereals to determine which is less expensive. Figure out the price for both cereals, and which is the less expensive.

Brian's cereal is $3.84 for 24 ounces.

Steve's cereal is $4.48 for 32 ounces
PLSSS HELPP

Answers

Me being a junior in high school and not knowing middle school math

Answer:

Steve

Step-by-step explanation:

32 ounces for $4.48 each = $143.36 for 32 ounces

24 ounces for $3.84 each = $92.16 for 24 ounces

Steve's cereal is more expensive.

If you wanted to know how much each ounce cost and determine your answer:

Steve's cereal is still more expensive.

Noah was playing with his wooden blocks and created a house.

What would be the area of the front of the house?



51 in²


12 in²


63 in²


39 in²

Answers

Answer:

it is A. 51 in

Step-by-step explanation:

so what I did was I went to a calculator and did 8.5 x 6 =51. then I did 51 divided by 8.5 and got 6.

so you know it is right

51n2 the 4in is just trying to trick you I doesn’t matter

Write an equation in which the quadratic expression 2x^(2)-2x-12equals 0. Show the expression in factored form and explain what your solutions mean for the equation. Show your work.

Answer:

Answers

Answer:

Begin by factoring 2 out of   2x^2 - 2x - 12 equals 0:

2(x^2 - x - 6) = 0

2(x - 3)(x + 2) = 0.  2 is never zero, but x-3 and x+2 can each be set = to 0:

This results in x = 3 and x = -2.  The equation is true for these two x-values.

Hope this helped :3

-Jazzy <3

Yeah what that person said

How can we use 1/2 inch edge lengths to find the volume of a prism that is 1/2 inch by 2 inch by 3 1/2 inches? I will mark brainliest!

Answers

Volume is length times width times height so multiply those

can u answer pls I will give brainliest

Answers

Answer:

Question 1: y-11x+5 I think; Question 2: I'm not sure

Step-by-step explanation:

y=11x+5
y=-4x+2
i’m not sure about the second one but i think that’s correct
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