A 78 gram sample of Uranium loses half of its mass each year. What is the Exponential equation??

A.
[tex]y = 78(1.5) {}^{x} [/tex]
B.
[tex]y = 78(0.5) {}^{x} [/tex]
C.
[tex]y = 78(2) {}^{x} [/tex]

Answers

Answer 1

Answer: B , 78(0.5) ^x

Step-by-step explanation: it’s being multiplied by 0.5, which is half.


Related Questions

Y is inversely proportional to cube root of x. what x= 1/8y=2 find the constant of proportional​

Answers

Answer:

1/2

Step-by-step explanation:

[tex]y = \sqrt[3]{\frac{1}{8x}}\\\\=\sqrt[3]{\frac{1}{2*2*2*x}}\\\\=\frac{1}{2}\sqrt[3]{\frac{1}{x}}[/tex]

Constant of proportional= 1/2

Write a decimal and a fraction for the shaded part of the diagram.

A. 0.60; 160/100

B. 0.63; 163/100

C. 1.60; 160/100

D. 1.63; 1 63/100

Answers

The correct answer is
D. 1.63; 1 63/100
D. 1.63; 163/100 hope this helps

The sales tax on a $30 purchase was
$2.40. What was the sales tax rate?

Answers

Answer:

8 percent

Step-by-step explanation:

2.4/30 = 0.08 or 8%

Use the simple interest formula to find the interest earned and the ending balance. I = Prt (please show work)


1. $9,000 at 4% for 2 years

Answers

Answer:

720

Step-by-step explanation:

I = Prt

I = (9000)(0.04)(2)

I = 720

Just type the numerical solution.
2 (n + 4) = 8-n

Answers

2 (n+4)=8-n like this

What angle is paired with angle D as an alternate interior angle?

Answers

Answer:

E

Step-by-step explanation:

i dont know at this point

Answer:

angle E

Step-by-step explanation:

Hello There!

We need to find an angle that is a pair with angle D and they have to be alternate interior angles

alternate interior angle properties:

On the inside of the parallel linescongruent

In the image below; represents a pair of alternate interior angles

These properties match angle D with angle E

Why? they are both on the inside of the parallels

They also happen to be congruent

Suppose you have a 7-cm by 5-cm rectangle. You increase the length by 1 cm and decrease the width by 1 cm. You continue to do this. What happens to the perimeter of the rectangle? The area? Explain why this happens.

Answers

Answer:

Step-by-step explanation:

P of original = 14 + 10 = 24

P of original l + 1  and w - 1 = 16 + 8 = 24

P of original l + 2  and w - 2 = 18 + 6 = 24

The perimeter remains the same each time since Perimeter is to the 1st power and you are summing; by subtracting from one and adding the same amount to another measure there is no change in perimeter

A of original = 7 x 5 = 35

A of original l + 1  and w - 1 = 8 x 4 = 32

A of original l + 2  and w - 2 = 9 x 3 = 27

A of original l + 3  and w - 3 = 10 x 2 = 20

A of original l + 4  and w - 4 = 11 x 1 = 11

The area decreases by 3,5,7,9 units each time since Area is to the 2nd power since you are multiplying two measures, now if you take the 2nd differences of 3,5,7,9 you see that they are 2 units apart each time, so are is squared and the 2nd differences are constant

Which matrix represents the vertices of the rectangle after it is scaled by a factor of 3?
0 0 120
12 12 6 0
(4,4)
(0, 2)
To 12 12 67
0 12 12 6
(0,0)
(40)
To 12 12 0
0 0 12 6
DONE

Answers

the awnser is C I just got it right

Mark uses 3 1/8 pounds of seed to fill the birdfeeders in his backyard, but he only has 1 1/2 pounds of seeds.

Part A
How much seed does he need to buy?

Answers

Answer:

1 5/8 pound.

Step-by-step explanation:

Convert 1/2 into 1/8's.

1/2 = 4/8.

We now have 1 4/8.

Subtract that from 3 1/8.

 3 1/8

- 1 4/8

-----------

 1 5/8

Your answer is 1 5/8 pound.

Hope this helps. Have a nice day.

Find the area of the shaded region.

Answers

Answer:

B. x^2-10

Step-by-step explanation:

Your are trying to find the shaded region

You can see that the x by x square would be "full" if not for the 2 by 5 chunk that has been taken out of it

Therefore you can find the area by subtracting the 2 by 10 "chunk" out of the total area of the x by x square

Equation:

(x*x)-(2*5)

x^2-10

The answer is B

2 sin^2 (x) + 3 sin (x) + 1 = 0
help me find the solution

Answers

Answer:

Step-by-step explanation:

\[2~ sin^2 x+3sin x+1=0\]

\[2sin^2x+2sin x+sin x+1=0\]

2sinx(sin x+1)+1(sin x+1)=0

(sin x+1)(2 sin x+1)=0

either sin x+1=0

sin x=-1=sin 3π/2=sin (2nπ+3π/2)

x=2nπ+3π/2,where n is an integer.

or 2sin x+1=0

sin x=-1/2=-sin π/6=sin (π+π/6),sin (2π-π/6)=sin (2nπ+7π/6),sin (2nπ+11π/6)

x=2nπ+7π/6,2nπ+11π/6,

where n is an integer.

What is
Mean
Medium
And Mode

Answers

Answer:

mean is the average value in the list.

first you add all number, then divide that value by the total number in the list

lets say (2,3,4,5)

you add 2+3+4+5 = 15 / 4

4 is the count

you'll get the average.

medium is the middle value in the list, but you should list from least to greatest

mode is repeated value in the list

Answer:

Step-by-step explanation:

The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers. The "median" is the "middle" value in the list of numbers.

The median is the value separating the higher half of a data sample, a population, or a probability distribution, from the lower half. In simple terms, it may be thought of as the "middle" value of a data set. For example, in the data set {1, 3, 3, 6, 7, 8, 9}, the median is 6, the fourth number in the sample. The median is a commonly used measure of the properties of a data set in statistics and probability theory.

The mode is the value that appears most often in a set of data. The mode of a discrete probability distribution is the value x at which its probability mass function takes its maximum value. In other words, it is the value that is most likely to be sampled.

Which choice shows 6+2+14 rewritten correctly using the commutative property and then simplified correctly?

Answers

Answer:6+14+2=20+2=22

Step-by-step explanation:6+2+14=22

In commutative property, the order of the addends is changed and the answer is simplified.

The proportion of red marbles to blue marbles in a jar is 3 to 8. If there are 56 blue marbles in the jar, how many red marbles are there?

Answers

Answer:

21

Step-by-step explanation:

3:8

8x7 = 56

3x7 = 21

Which of the following is a sinusoid?
O A. y = x
OB. x2 + y2 = 1
O C. y = cos x
O D. y=[x]

Answers

The correct answer is c y=cos x

The function y = cos(x) : represents a sinusoid. It has a maximum value of 1 and minimum of -1.

What is sinusoid?A sine wave or a sinusoidal wave is graph representing the sine function.It has a maximum value of 1 and minimum of -1. It is a periodic function.The sine function is given by {y} = sin{x}.

Given is to identify which of the given functions are sinusoids.

Now, we can see that -

y = x : represents a straight line.

x² + y² = 1 : represents a circle with unit radius.

y = cos(x) : represents a sinusoid. It has a maximum value of 1 and minimum of -1.

Therefore, the function y = cos(x) : represents a sinusoid. It has a maximum value of 1 and minimum of -1.

To solve more questions on functions, visit the link below-

https://brainly.com/question/30194223

#SPJ7

What is the area, in square centimeters, of a 8cm circle

Answers

If the diameter of the circle is 8cm then the radius must be 4cm. Hence area of the circle must be =50.26cm squared

I WILL GIVE BRAINLIEST!!!

Answers

#1 or A because i have done this  ed. 2020

Answer:

Here is your answer.......................................

Step-by-step explanation:

The sum of 3rd and 4th terms of GP is 108 ,The sum of 4th and 6th term of the same GP is 324 ,find common ratio

Answers

Complete Question

The sum of 3rd and 4th terms of GP is 108 ,The sum of 4th and 5th term of the same GP is 324 ,find common ratio

Answer:

3

Step-by-step explanation:

The formula for Number of term of a GP = ar^n-1

The sum of 3rd and 4th terms of GP is 108

ar² + ar³ = 108... Equation 1

ar²(1+ r) = 108 ..... Equation 1

The sum of 4th and 5th term of the same GP is 324 ,

ar³ + ar⁴= 324... Equation 2

ar³ (1 + r) = 324..... Equation 2

find common ratio

ar²(1+ r) = 108 ..... Equation 1

ar³ (1 + r) = 324..... Equation 2

Solving for r

ar²(1+ r)/ar³ (1 + r) = 108/324

1/r = 1/3

r = 3

Hence, Common ratio = 3

A square parking lot has an area, what is the length of one side

Answers

Answer:

Option A will be your answer

Step-by-step explanation:

hope it helps u....

pls hurry will give brainlyest or whatever !!!

Which coordinate rule matches this description? Dilation of original by 5.

(5x, y)

(x+5, y+5)

(5x, 5y)

(x, 5y)

Answers

Answer:

D  (x,5y)

Step-by-step explanation:


Question 9: What does x equal?

Answers

26

Step-by-step explanation:

3x + 2x = 50 = 180

5x = 130

x = 26

In algebra, x will equal 2


A circle has a diameter of 32 units. What is the area of the circle to the nearest hundredth of a square


Answers

Answer:

804.25 units²

Step-by-step explanation:

radius = diameter / 2

Area of a circle = πr²

radius = 32/2 = 16 cm

Area = (16)²π

Area = 256π = 804.247719

Area ≈ 804.25 units²

solve for x in the triangle. round to the nearest tenth

Answers

Answer:

x= 6.3

Step-by-step explanation:

sinx= opp/hyp

sin23° = x/16

x= sin23° * 16

x= 6.25 -> 6.3

Step-by-step explanation:

you can use this formula and find the answer

ac square = ab square + bc square

Create a linear equation in the slope-intercept form that contains points (2,-8) and (6,-4). PLSSS HELPP Giving brainliest.

Answers

Answer:

y = x - 10

Step-by-step explanation:

(2,-8) and (6,-4)

m=(y2-y1)/(x2-x1)

m= (-4 + 8)/(6-2)

m= 4/4

m=1

y - y1 = m(x - x1)

y + 8 = 1(x - 2)

y + 8 = x - 2

y = x - 10

Addison is shooting a free throw. The initial height of the ball is represented by the____
A. x-intercept
B. y-intercept
C. zeros
D. vertex

Answers

9514 1404 393

Answer:

  B.  y-intercept

Step-by-step explanation:

If we assume that the graph of the free-throw is of height versus time, then the initial height is the y-intercept—when time = 0.

Two families go to a zoo.
The Smith family of two adults and three children pay £61.
The Jones family of three adults and five children pay £96.
Work out the cost of an adult ticket and the cost of a child ticket.

Answers

Answer:

The adult tickets cost £17.00 and child tickets cost £9.00

Step-by-step explanation:

2a + 3c = 61

2a = 61 - 3c

a = 30.5 - 1.5c

3(30.5 - 1.5c) + 5c = 96

91.5 - 4.5c + 5c = 96

91.5 + 0.5c = 96

0.5c = 4.5

c = 9

a = 30.5 - 1.5c

a = 17

The adult tickets cost £17.00 and child tickets cost £9.00

Could 17 25 and 36 be a right triangle

Answers

Answer:

No b/c the hypotenuse is too long

Step-by-step explanation:

17² + 25² = 36²

289 + 625 = 1296

914 ≠ 1296

3x + 8 = 3x+
What value could you write in after 3x that would make the equation true for:
no values of x?

Answers

Answer:

any number except 8

Step-by-step explanation:

Help plzzzzzzzzzzzzz

Answers

90 x 0.9 (90%) = 81 students

This means 81 students are enrolled in health.

Hope this helps :)

Answer:

OK

Step-by-step explanation:

the volume of a cube is 2,197 cubic feet. what is the length of each side of the cube?
(pls give an explanation)

Answers

Answer:

13

Step-by-step explanation:

Since all the sides of a cube are equal, one single side will be the cube root of the volume i.e,2197 to give me 13

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