Element X decays radioactively with a half life of 8 minutes. If there are 480 grams of
Element X, how long, to the nearest tenth of a minute, would it take the element to
decay to 14 grams?
y=a(.5)
Answer:
40.8 minutes
Step-by-step explanation:
Element X decays radioactively with a half life of 8 minutes. If there are 480 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 14 grams?
The formula to find how long it would take which is the time elapsed is given as:
t = t½ × In(Nt/No)/-In2
t = ?
t½ = 8 minutes
Nt = Amount after the time of decay = 14 grams
No = Original Amount of substances = 480 grams
t = 8 × In(14/480)/-In2
t = 40.796285388407 minutes
Approximately to the nearest tenth = 40.8 minutes
Therefore, it would take the element X, 40.8 minutes to decay to 14 grams
FIND THE AREA OF THE SHAPE
Answer: I think 72 sorry if this didnt help
Step-by-step explanat
Pls help..what’s the answer to this question
Answer:
x = 25
Step-by-step explanation:
53 = 2x + 3
x = (53 - 3)/ 2
x = 25
How does the graph of g(x) compare to the graph of the parent function f(x)?
thinking you braindead mf
1. A Pentagon has interior angles of 70°, 130°, 115° and 110°. What is the measure of the 5th angle?
2. What is the name of a triangle whose interior angles are 45°, 45° and 90°?
3. What is the measure of an exterior angle adjacent to a 75° interior angle?
#2 is isosceles
#3 is 105°
$140 spent on a 90-minute taxi ride
Mrs. Humble is filling bags with peanuts to give as gifts. Each bag will contain 1 and 3 over 4 pounds of peanuts. The peanuts cost $5.00 per pound. How much will the peanuts in one bag cost?Mrs. Humble is filling bags with peanuts to give as gifts. Each bag will contain 1\frac{3}{4} pounds of peanuts. The peanuts cost $5.00 per pound. How much will the peanuts in one bag cost?
Answer:
$8.75
Step-by-step explanation:
STEP TO TAKE TO DETERMINE THE ANSWER
Multiply 13/4 pounds by the cost of one pound of peanut. To do this, convert 13/4 to an improper fraction and then multiply it by $5
[tex]1\frac{3}{4}[/tex] = [tex]\frac{7}{4}[/tex]
[tex]\frac{7}{4}[/tex] × 5 = [tex]\frac{35}{4}[/tex] = [tex]8\frac{3}{4}[/tex] = $8.75
If you need to construct a dog run for your dog and the total perimeter needs to be 40 feet, and you only have enough room to make it 5 feet wide, how long can you make the dog run?
Answer:15 ft
Step-by-step explanation:
Given
The total perimeter needed is [tex]40\ ft[/tex]
The available width of the room is [tex]w=5\ ft[/tex]
Suppose l is the length of the room
So, the perimeter of a rectangle-shaped room is [tex]2(l+w)[/tex]
Putting values
[tex]\Rightarrow 40=2(l+5)\\\Rightarrow l+5=20\\\Rightarrow l=15\ ft[/tex]
I someoneeee pleaeee helpppp?!
Answer:
Check pdf
Step-by-step explanation:
Evaluate the expression 3(2x - 8) /7x when x= -3
Answer:
2
Step-by-step explanation:
..............
PLEASE HELP ME SLOVE
Answers
A.72
B.6
C.12
D.4/41
[tex]{ \sf{ \red{using \: pythagoras \: theorem}}} \\ \\ { \sf {(20)}^{2} - {(16)}^{2} = {x}^{2} } \\ \\ { \sf{400 - 256 = {x}^{2} }} \\ \\ { \sf{144 = {x}^{2} }}[/tex]
[tex]{ \sf{x = \sqrt{144} }} \\ \\ { \boxed{ \boxed{ \green{x = 12}}}}[/tex]
option (C)
You deposit $1500 in an account that pays 5% interest compounded yearly. Find the balance after 6 years. please help
1500+5%= 1505 that is the answer I got I hope this was helpful
WILL GIVE BRAINLIEST!
A custom-illustrated sign or banner can be commissioned for a cost of $20 for the material and $12.50 per square foot for the artwork. The equation that represents this cost is given by y = 12.50x + 20, where y is the cost and x is the number of square feet in the sign.
Graph this equation for values of x from 0 to 20.
The point (5, 82.5) is on the graph. Select a sentence that describes the meaning of this ordered pair.
A. It costs $5 for a custom sign 82.5 ft2 in area.
B. It costs $12.50 for a custom sign 20 ft2 in area.
C. It costs $20 for a custom sign 12.50 ft2 in area.
D. It costs $82.50 for a custom sign 5 ft2 in area.
E. It costs $270 for a custom sign 20 ft2 in area.
Answer:
D
Step-by-step explanation:
12.50 x 5 = 62.5
62.5 + 20 = 82.5
Mrs smith and i went to the shop to creme eggs at 23p each & kinder eggs at 47 peach in bulk. We bought 141 eggs altogether & it came to 48.51 how many creme eggs did we buy ?
Answer:
Step-by-step explanation:
Mrs smith and i went to the shop to creme eggs at 23p each & kinder eggs at 47 peach in bulk. We bought 141 eggs altogether & it came to 48.51 how many creme eggs did we buy ?
Work out the length x.
17 cm
9 cm
Answer:
14.4222051019 or 14.42
Step-by-step explanation:
a^2 + b^2 = c^2
x^2 + 9^2 = 17^2
x^2 + 81 = 289
x^2 = 289 - 81
x^2 = 208
x = 14.4222051019 or 14.42
what is the volume of the rectangular prism
Answer:
10ft3
Step-by-step explanation:
just trying to help but don't if thats right
Answer:
10ft3. Succes to the homework
answer all questions below. 50 points, grade 9 math
Answer:
1 will be less than 3 but still equal the x coordinate.
If a designer sold 2,000 units of a dress with total sales of $190,000, what was the average price of the garment?
Answer:
$95
Step-by-step explanation:
We can divide 190,000 by 2,000, since we're assuming they all cost the same. This gets us to our answer, 95. Therefore, each garment cost $95 on average.
The rectangle below has an area of 81-x^281−x
2
81, minus, x, squared square meters and a width of 9-x9−x9, minus, x meters.
Answer:
1
Step-by-step explanation:
1x1
difference in length between 3 3/4 and 4 2/3
What is the greatest common factor of 20w and 45wt
A. W
B. T
C. 5w
D. 45
Answer:
c
Step-by-step explanation:
20w=4w*5w
45WT=5WT*9WT
Look at the picture please
Answer:
c=10
Step-by-step explanation:
Hope it helps. Doing all your questions that you send XD
Answer:
10
Step-by-step explanation:
using the pythagorean theory the missing side would be [tex]c^{2}[/tex] bs its the hypotenuse so
[tex]a^{2} + b^{2} = c^{2}[/tex]
[tex]8^{2} + 6^{2} = c^{2}[/tex]
[tex]64 + 36 = c^{2}[/tex]
[tex]100 = c^{2}[/tex]
and the square root of 100 is 10, which makes your equation
[tex]c = 10[/tex]
HELP! What is equivalent to (8.4z+2.5)+(-3.7x+5
Answer: -21x + 32z + 15
Step-by-step explanation:
can someone pls help me with this ;/ select ALL that apply.
Answer:
a, b and f
Step-by-step explanation:
3-4/5X-2/3–3/15+3/5divided by -3/2
Answer:
-2(6x-13)/15
Step-by-step explanation:
This is done by simplifying the expression as well as combining like terms
A sandwich store charges $20 to have 3 turkey subs delivered and $26 to have 4 delivered. The total includes the cost of each sub, plus the delivery fee.
Answer:
cost of each sub = $6, delivery fee = $2
Step-by-step explanation:
Let $x be the cost of each sub and $c be the delivery fee
3x + c = 20
4x + c = 26
x = 6, c = 2
2.Five increased by product of x and three is 23. What is x?
3.Twice x deceased by four is 36. What is x?
4. The local craft fair charges the vendors a flat rate of $15 plus $5 for each hour that they spend at the fair. If the vendor owned $50, how many hours did he remain at the craft fair?
5. During the fall, you charge $8 to go to a house and rake the leaves and additional $6 for every hour that you take the yard. If you earned $32, how many hours did you spend raking the leaves?
6. You spent $1,400 on new furniture. The local furniture store allows you to make a down payment of $500 and then pay the remaining balance in three monthly payments. How much are the monthly payments?
7. A cellphone company charges $17 plus $0.25 for each text message sent. The total bill was 45.50. How many text were sent?
Sorry it’s a lot
Answer:
7 is 114 texts.
6 is 300 dollars.
5 is 4 hours.
4 is 7 hours.
I dont know about 2 and 3 (or i dont feel like trying)
Step-by-step explanation:
17 initial payment, 45.50-17=28.5.
28.5/0.25=114
Plsplspls help 22 points and brainly ONLY ANSWER IF YK THE ANSWER TY!! :)
Answer:
(Infinitely), (No solution), (One solution), (One solution)
Step-by-step explanation:
1. 5x + 9 = 9 + 5x (Infinitely)
2. -4x + 8 = -4x - 8 [minus -4x from both equation, we get 8 = -8, which is impossible] (No solution)
3. x - 3 = 3 - x [2x = 6, x = 3] (One solution)
4. 3x + 7 = 7x + 3 [4x = 4, x = 1] (One solution)
Mr. Bucci goes to the grocery store and purchases
17 bags of raisins and a $2.97 jar of peanut butter.
His total cost was $34.76. What was the cost for a
bag of raisins?
Help
anyone knows the answer
