Answers
Answer:
4 is the answer hope this helps
Related Questions
A mine worker discovers an ore sample containing 500 mg 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:
7.8125 or 7.8
Step-by-step explanation:
[tex]gm=(1/2)^{n-1}[/tex]
[tex]gm=500 (1/2)^{ 7- 1} \\gm= 500 (1/2)^{6}[/tex]
= 7.8125 or 7.8
The amount of radioactive material in the sample at the beginning of the 7th day is 3.906 milligram.
What is Half life of an Element?Half life of an element is the time taken by a radioactive substance to break down into half the quantity of the initial quantity.
In other words, we can say that it is the time for an element to disintegrate half of it's atoms.
Given that,
Half life of radioactive material is 1 day.
Initial amount of the substance = 500 mg
At the beginning of the first day, there will be 500 / 2 = 250 mg os substance.
Taking the first term as 250 and the common ratio as 1/2, we can consider this as a geometric sequence.
nth term of a geometric sequence = a rⁿ⁻¹, where a is the first term and r is the common ratio.
At the beginning of seventh day,
Amount of radio active substance = 250 (1/2)⁷⁻¹ = 3.90625
Hence the amount at the beginning of seventh day is 3.906.
Learn more about Geometric Sequence here :
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11/3 × 5/8
A. 3/4
B. 4/5
C. 5/6
D. 5/8
btw these are fractions if you dont know the answer then please do NOT waste my points. i tried hard to get these points.
Answers
Nun of them are right the real anwser would be 55/24 and as a decimal 2.2916666666667
I just need 1 more reason for the black text. Thanks!
Answers
Answer:
1: proportion means 2 ratio are equivalent
2: its also known as constant of proportionality
Step-by-step explanation:
give me brainlist pls
WILL GIVE BRAINLY PLZ HELP ASAP
John’s house is 12 miles away from school. He is two-thirds of the way home. How many miles has he walked?
A. 8
B. 16
C. 18
D. 24
Answers
Answer:
the answer is 8 miles
Step-by-step explanation:
Mr. McLean manages playgrounds for the 8 elementary schools in the Franklin School District. This year, he wants to put new sandboxes at each of the schools. He estimates that he will need 3 tons of sand for this project. How many 50-pound bags of sand should he order for each school?
Answers
3 tons = 6000
6000/8= 750lbs for each school
750/50=15 (50#) bags needed
theres 2 questions, please answer will give brainliest
Answers
Answer:
1. 207.35
2. 153.94
Step-by-step explanation:
2. 153.94 is the two answer
Based on the context in paragraph 4, fossil refers to _____.
Answers
fuol next time put the paraghpt too pls
Step-by-step explanation:
Which equation is parallel to:
y = -2x +2
Group of answer choices
y = 1/2x +7
y = -2x +5
y = -1/2x +3
y = 2x +6
Answers
Answer:
y = -2x +5
Step-by-step explanation:
If the slope(-2x is the slope in this case) is the same, then the equation is parallel
Help Me Please! Will Give Brainliest for the first person who is correct!!
Answers
Answer:
= 1/4
Step-by-step explanation:
1/4
Decimal form: 0.25
How does the decimal point move when multiplying 79.816×103?
Answers
Answer:
8221.048
Step-by-step explanation:
Answer:
It moves two places to the right
Step-by-step explanation:
Lets pretend we are multiplying my 100 instead of 103. That has two zeroes, so 79.816 would turn into 7981.6
If we did multiply by 103, the answer would be 8221.048, which is still two places to the right
Evaluate the expression when x=20 and y=4.
8y−x =
Answers
Answer:
12
Step-by-step explanation:
You literally have x and y, just plug them into the equation. It will be 8(4)-20=12
Answer:
12
Step-by-step explanation:
Write in slope intercept form
5x - 3y = -9
Group of answer choices
y = (5/3)x + 9
y = (5/3)x - 3
y = (3/5)x + 3
y = (5/3)x + 3
Answers
Answer:
Y = (5/3)x + 3
Step-by-step explanation:
Plz brainliest
HELP I NEED RIGHT ANWSER QUICK!!!
Answers
Answer:
Make soooo much sense
Step-by-step explanation:
help plsss omf this is hard (8th)
Answers
Answer:
(-2,5)
Step-by-step explanation:
Answer:
(-2,5)!!!!!!!!!
Step-by-step explanation:
ILL GIVE BRAINLIEST HELP WITH ALGEBRA
Simplify the expression
(x+y)⁵ ÷ (x+y)²
Answers
I WILL MARK BRAINLIEST IF ITS CORRECT
Answers
Answer
Step-by-step explanation:
BRAINLIEST GOING TO THE FIRST ANSWER
Answers
Answer:
w + 2.3 > 18
Step-by-step explanation:
MARK ME BRAINLIEST!!!!!!!!!
Answer:
w + 2.3 > 18
Step-by-step explanation:
hope this helped :)
need help plz i show me how to do it plz :)
Answers
plssss help me with this thx im not good at math
Answers
Use operations of decimal, fraction, and percent numbers to model the following scenarios. In your final answer, include only an equation or proportion modeling the scenario. Do not solve the problems.
A family dines in a popular franchise restaurant. At the end of the meal, they decide to leave their server a monetary tip that is equal to 20% of the total bill amount, $60.50. How much will the family leave their server as a tip?
A family dines in a popular franchise restaurant. They plan to use a coupon that will give them a discount of 15% off of their total dinner bill, not including applicable sales tax or their server’s tip. If the family’s dinner bill totaled $34.00 before tax and tip, how much money will they save by using the coupon?
A family dines in a popular franchise restaurant. They plan to use a coupon that will give them a discount of 10% off of their total dinner bill, not including applicable sales tax or their server’s tip. The bill totals $157.30 before tax and tip. What is the new total after the server applies the 10% off coupon?
A family of eight dines in a popular franchise restaurant. The restaurant has a policy of automatically including a standard tip to the final bill for parties larger than six people. The bill for the meal included a total of $58.25 in food and beverage sales, plus a standard tip of $10.49. What percent of the food and beverage sales does the restaurant consider to be a standard tip for parties larger than six?
A family dines in a popular franchise restaurant that has a policy of automatically including a 20% tip on all food and beverage sales before coupon discounts are applied. What is the family’s total bill amount if their food and beverages totaled $94.20 and they used a 15% off coupon? (HINT: Create more than one model.)
Answers
An2=1
Step-by-step explanation:
i got ur point hehe. gotta go my own way
Answer:
1) 60.50*20=1210
=move the decimal
=12.10
2)15*34=510
=move the decimal
=5.1
3)10*157.30=1573
=move the decimal
=15.73
157.30-15.73= 141.57
4)58.25/10.49=5.55
5)94.20+18.84=113.04
113.04-14.13=98.91
Step-by-step explanation:
Sorry if I got any of them wrong
please help my guys plaese
Answers
Answer: I think it’s A
Step-by-step explanation:
Not sure though
Answer:its C
Step-by-step explanation:
plz help
in this experiment, you will use a track and a toy car to explore the concept of movement. You will measure the time it takes the car to travel certain distances, and then complete some calculations. In the space below, write a scientific question that you will answer by doing this experiment.
Answers
Answer:if you need a question you can say “ how far did the toy car move? “
Step-by-step explanation:
Screen-printing a batch of shirts requires 2 minutes per shirt in addition to 4 minutes of initial set-up time. If it takes 80 minutes to screen-print a batch of shirts, how many shirts are in the batch?
38
4
40
20
Answers
38 is the correct answer because 80-4=76 then divide that by 76/2 give you 38
2/5 divided by 1/4 as a fraction
Answers
Answer:
Step-by-step explanation:
2/5 divided by 1/4 is which (2/5)/(1/4) is equal to fraction 8/5
The given statement "2/5 divided by 1/4 as a fraction"
It can be written as in mathematical form as (2/5)/(1/4)
To solve 2/5 divided by 1/4 as a fraction,
Multiply the first fraction by the reciprocal of the second fraction.
The reciprocal of 1/4 is 4/1.
So, we have (2/5) ÷ (1/4) = (2/5) x (4/1).
Multiplying the numerators and denominators gives us
(2x4) / (5x1) = 8/5.
Therefore, 2/5 divided by 1/4 is equal to 8/5.
Learn more about the multiplication visit:
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Solve the equation 3= d+2
Will give brainliest be quick plz
Answers
Answer:
d=1
Step-by-step explanation:
Answer:
D=1
Step-by-step explanation:
3-2 =1 1+2=3
Write a story that could represent this math problem.
The equation four times three eighths. Below is four rectangles partitioned into eight equal parts. All the rectangles each have three parts shaded.
Answers
Answer:
My friend Matthew bought four pizzas. We ate five eighths of each pizza leaving three eighths left in each box. How much pizza did we have left over between the four boxes?
4 times 3/8 is equal to 1.5. (just felt it was incomplete without this answer. Also, hope this was a satisfactory answer.)
Gia measures the mass of her football. She uses four 100g weights and two 10g weights to balance the scale. What is the mass of the football?
Plz Halp, I'm dum....
Answers
please help me ill mark brainliest
Answers
Answer:
its C and 4.7x10 -5 was right
Step-by-step explanation:
please help ill give brainliest
Answers
Answer: C
Step-by-step explanation: She wants to sell more than 180, so it isn't equal too. Each ticket costs $15. Good luck! :D
Answer:
so basically I think that the third one is right bc if she wants to raise more than $180 then t=13 and 15(13) Is 195
I have a question. what grade is this bc I am in 6th and I wnna know if I'm smart lol
The table below shows the data for a random sample of fish that were collected from and later released into a lake:
Type of Fish Catfish Grass Carp Bluegill
Number of Fish 52 61 87
How many bluegills are estimated to be present if a sample of 800 fish is collected from the lake? (5 points)
Group of answer choices
148
174
244
348
Answers
Answer:
244
Step-by-step explanation:
It is pretty sure 244