Answers
Related Questions
If 14 g of a radioactive substance are present initially and 2 yr later only 7 g remain, how much of the substance will be present after 5
yr?
Answers
Answer:
2.47g
Step-by-step explanation:
Given that Ao=14
A(t)= Aoe^kt
k =2yrs
Considering the function where Ao is the initial substance, k is the rate of decay and t is the time.
At the 2nd year A(t) is 7
That is,
7 = 14e^2k
Solve for k
7/14 = e^2k
In(7/14) = 2k
k = In(7/14)÷2
k = In(0.5)/2
k = -0.34657
Hence, A(t)= 14e^-0.34657
So, when t is 5
A(5) = 14e^-0.34657×5
= 2.4749
Approx = 2.47g
What is the sign of the product of (-1/5) (-2/3) (-1/9) (-4/7)
Answers
Answer:
Step-by-step explanation:
4 minuses give a plus
8/945
If the terminal point determined by t is (-5,-4), then
\sin (t) =
;
\cos (t) =
;
\tan (t) =
.
Answers
Answer:
The trigonometric ratios associated with (-5, -4) are [tex]\sin t \approx -0.625[/tex], [tex]\cos t \approx -0.781[/tex] and [tex]\tan t = 0.8[/tex].
Step-by-step explanation:
Let [tex]\vec u = (x,y)[/tex]. From Trigonometry, we remember the following definitions for the trigonometric ratios, dimensionless:
[tex]\sin t = \frac{y}{\sqrt{x^{2}+y^{2}}}[/tex] (1)
[tex]\cos t = \frac{x}{\sqrt{x^{2}+y^{2}}}[/tex] (2)
[tex]\tan t = \frac{y}{x}[/tex] (3)
If we know that [tex]x = -5[/tex] and [tex]y = -4[/tex], then the trigonometric ratios are, respectively:
[tex]\sin t = \frac{-4}{\sqrt{(-5)^{2}+(-4)^{2}}}[/tex]
[tex]\sin t \approx -0.625[/tex]
[tex]\cos t = \frac{-5}{\sqrt{(-5)^{2}+(-4)^{2}}}[/tex]
[tex]\cos t \approx -0.781[/tex]
[tex]\tan t = \frac{-4}{-5}[/tex]
[tex]\tan t = 0.8[/tex]
The trigonometric ratios associated with (-5, -4) are [tex]\sin t \approx -0.625[/tex], [tex]\cos t \approx -0.781[/tex] and [tex]\tan t = 0.8[/tex].
The square of the sum of 7 times xand 3 divided by 4 time the difference of x and 1
Answers
(7x + (3)/(4))^(2)-(x-1)
784
x
2
+
152
x
+
25
16
You’re playing tug-of-war in gym class at the start you take two steps back the other team pulls you and takes three steps forward which equation can be used to find how far you are from your original position?
A: -3+2
B: -2+(-3)
C: -2+3
D: 2+3
Answers
. The ratio of a model car to the real car is 2:55. If the real car is 165 inches
long from front to back, use a proportion to determine the length of the model
car.
Answers
Answer:
6
Step-by-step explanation:
An inference _______.
a. is a possible explanation for events using prior knowledge
b. explains if a hypothesis is or is not valid
c. is made independent of observation or prior knowledge
d. can be either qualitative or quantitative
Answers
Answer:
It is a possible explanation of events using prior knowledge
Step-by-step explanation:
Order the numbers from least to greatest. 0.12, 10%, 340, 0.08
Answers
Answer:
∞
Step-by-step explanation:
Answer:
0.08, %10, 0.12 and 340
Step-by-step explanation:
Determine if the point (12, 20) is on the
graph of y = 2x – 5. Justify your answer.
Answers
Answer:
456[67]98
Step-by-step explanation:
Answer:
Step-by-step explanation:
for the point (12,20) to be on the graph the equation of the line has to be true.
y=2x-5 so is it true that
20= 2*12-5
20=19 false
so the point is not on the graph
Sally is working on a new recipe for her party. She needs to get 3.5 pounds of strawberries, 1 quart of milk, and 1 box of sugar cookies. The prices below list how much items will cost Sally at the grocery store.
Strawberries $1.68 per pound
Quart of milk $2.38 each
Box of sugar cookies $1.99 each
Part A:
How much will 3.5 pounds of strawberries cost?
Part B:
What will Sally's total grocery bill be?
I REALLY NEED HELP PLEASE STAT
Answers
Answer: Part A. 5.88
Part B. 10.25
Step-by-step explanation:
Brainliest please ^^
Hope this helps
10.18 part b
5x - 20y = 2 in
slope intercept form
Answers
Answer:
-20+5x=2.
Step-by-step explanation:
..............
Martha works at a small jewelry store. She designed 2 rings in the furst hour. Every additional hour, she designs 3 new rings.
Answers
SOLVE, GRAPH AND CHECK:
6(4- x) < 12
Answers
Answer:
The answer is : x > 2
n
The measure of Zo is 150°. What is the value of mZb+mZc+mze?
O 90°
ОООО
120°
210°
Answers
Answer:
∠b + ∠c + ∠e = 120°
Step-by-step explanation:
From the attached figure,
∠b + ∠e + ∠a = 180° (Linear pair)
Given that, ∠a = 90°
∠b + ∠e = 90° ...(1)
Also,
∠c + ∠d = 180° (Linear pair)
Given that,
∠d = 150°
∠c = 180°-150°
= 30°
Adding ∠c to both sides of the equation (1).
∠b + ∠e + ∠c= 90° + ∠c
∠b + ∠c + ∠e = 90° + 30°
= 120°
Hence, the meaure of ∠b + ∠c + ∠e is equal to 120°
please help ASAP!!!!
Answers
Answer:
B.
Step-by-step explanation:
Plug in the x-values for x in the answer choices. The result will be the y-value of the table.
For example,
A. 3(-1)^2+3(-1)-2 = -2
That is not the y-value for -1, so A is not the answer.
B. 3(-1)^2-3(-1)-2=4.
4 works here, but make sure to try all the numbers.
3(0)^2-3(0)-2 = -2
3(3)^2-3(3)-2 = 16
B is the answer because with each x-value you substitute in for x, you get its corresponding y-value.
(-1,4) (0,-2) (3,16)
3 fair coins are tossed.
a) What is the probability of getting all 3 heads? (My Answer is 1/8)
b) What is the probability of getting all 3 tails? (My Answer is 1/8)
c) What is the probability of getting all 1 head and 2 tails? (My Answer is 3/8)
d) What is the probability of getting all 2 heads and 1 tail? (My Answer is 3/8)
My Question:
e) What do the probabilities from parts (a) to (e) add up to?
Answers
Answer:
1/8 + 1/8 + 3/8 + 3/8 = 2/8 + 6/8 = 8/8 = 1
So the answer would be 1.
2 points
Ms. Brown bought a bag of bubble gum. 15 were green, 13 were yellow, 4
were white, 10 were blue, and 8 were red. What percentage of the gum is
green? *
Answers
Answer:
30 percent
Step-by-step explanation:
15 + 13 + 4 + 10 + 8 = 50
15/50 = 30/100
Help please
The answer choices are
A) x=3/x
B)x=9/x
C)0=3/x+x
D)0=9/x+x
Answers
Answer:
A
Step-by-step explanation:
What is the correct unit for the following measurement?
Dana wants to know how much space her books occupy in her room.
cubic centimeters (cm3)
meters (m)
Celsius (°C)
gm/cm3
grams (g)
liters (L)
Answers
Answer:
Cubic centimetres
Step-by-step explanation:
It is a unit for volume
Jfifickxjcicixkskekeidixixjx
Answers
Enchiladas
PLEASE HELP!!
finding square roots of negative numbers
show your work
1-) V-18
2-) 2V-16
Answers
Answer:
Work shown below!
Step-by-step explanation:
[tex]\sqrt{-18}=\sqrt{18i^{2} } =\sqrt{2*9i^{2} }=3i\sqrt{2}[/tex]
[tex]2\sqrt{-16} =2\sqrt{16i^{2} } =4i*2=8i[/tex]
Can someone help meh on this question?
Answers
Please help me with A. B. C. I will mark brainlist
Answers
3/4 ton = 1500 pounds
1 1/2 quarts = 3 pints
Jillian and Dawn are playing a game of miniature golf. In this game, the score on a hole is the number of putts it takes to
get the ball into the hole. The winner is the player with the lowest score. After playing 18 holes, Jillian's mean is 2.4 and
Dawn's mean is 3.3. Which explains who won the game?
O Jillian won the game because her score varied less than Dawn's score.
O Jillian won the game because the person with the lower mean took fewer putts on average for each hole.
O Dawn won the game because the person with the greater mean played better.
O Dawn won the game because her mean absolute deviation was less than Jillian's.
Next
Submit
Save and Exit
Mark this and return
Answers
Answer: B
Step-by-step explanation:
What is the surface area of the pyramid 6 inches height 8 inches length 8 inches width
Answers
Answer:
384
Step-by-step explanation:
Formula:Length x Width x Hight
6x8=48 48x8=384
Have a good day!
What is the slope to y = 2x + 4
Answers
Answer:
2
Step-by-step explanation:
the number right next to the x is the slope, if there is no number, then the slope is 1
your equation in a y = mx + b format"
y is the outputm is the slopex is the inputb is the y interceptHELP MEEEEEEE PLZZZZZZZZZ 1 hundo
Answers
Answer:
x=6
Step-by-step explanation:
16*8=128
176-128=48
8*x should equal 48
8*6 makes 48 so x=6 makes this true
(answered 20. tell me if I need to answer both)
common denominator for 1/4 and 7/10
Answers
Step-by-step explanation:
Common Denominator is 20.
Some multiples of 4 are 4, 8, 12, 16, 20.
Some multiples of 10 are 10, 20, 30, 40, 50.
This shows that 20 is a common denominator because 20 is a multiple of both 4 and 10.
circular running track is 1/5 of a mile long. Elena runs on this track, completing each lap in 1/15 of an hour. What is Elena's running speed?
Answers
Answer:
3m/hr
Step-by-step explanation:
Answer:
3mph
Step-by-step explanation:
You are renting a house in the Seychelles for a week at $1700. What is the cost per day?
(Show your answer in dollars and cents: For example $300 is entered as 300.00)
Answers
Answer:
your paying for each day 56.66