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lara [203]
3 years ago
7

Iodine-131 is a radioactive material with half-life of eight days. A scientist starts with 100 grams of iodinie- 131. Which func

tion can be used to estimate the number of grams of iodine-131 remaining at the end of x days?
A. f(x)= 100(0.92)^x

B. f(x)= 100 (1.09)^x

C. f(x)= (0.92)^x

D. f(x)= (1.090^x
Mathematics
2 answers:
Viktor [21]3 years ago
7 0

Answer:

poop

Step-by-step explanation:

poop

MrRissso [65]3 years ago
6 0
The correct answer is Choice A.

This is an example of an exponential equation, so we need the formula y=ab^x.

The a value is the starting value of 100. The b value must be a decimal lower than 1 because it is decreases.

If you substitute in 8 for x, you will see that the output is about 50 (half of 100).
You might be interested in
What is the volume of a rectangular prism with length 7 cm, width 2 cm, height 5 cm?
gayaneshka [121]

Answer:

7x2x5= 70

Hope This Helps! :)

4 0
2 years ago
What is 3.3(x-8)-x=1.2
11Alexandr11 [23.1K]
Multiply 3.3 by everything in the parenthesis.

3.3x - 26.4 - x = 1.2

Combine like terms.

2.3x - 26.4 = 1.2

Add 26.4 to both sides.

2.3x = 27.6

Divide 2.3 on both sides.

x = 12

Hope this helps!
3 0
3 years ago
Read 2 more answers
It would mean a lot.
LUCKY_DIMON [66]
First, subtract y2 - y1 to find the vertical distance. Then, subtract x2 - x1 to find the horizontal distance.

Formula to find distance given two points.

Square root (X2 - X1)^2 + (Y2 - Y1)^2

Xa Ya Xb Yb
A = (3, -4) B = (-1, 3)

Xa goes into X2 and Xb goes into X1

(3 - (-1))^2

Ya goes into Y2 and Yb goes into Y1

(-4 - 3)^2

Square root (3 - (-1))^2 + (-4 - 3)^2

Square root (4)^2 + (-7)^2

Square root 16 + 49

Square root 65

= 8.06

The error was Drako had (3 - 4)^2 when it should have been (3 - (-4))^2 because a positive is subtracting a negative.
6 0
2 years ago
If you plotted the points in the table and connected
castortr0y [4]

Answer:

U shaped.

Step-by-step explanation:

When x = 0 , f(x) = 6

when x =1 yf(x) = 0

when x = 2 f(x) = -2

x = 3 f(x) = 0

x = 4 f(x) = 6.

So the graphs falls from the left and rises to the right in the form of a U.

You can draw a rough graph to confirm this.

3 0
2 years ago
Now, think about multiplying-25×-35.
Aliun [14]

Answer:

Positive

Step-by-step explanation:

If you multiply both negative, it will always result to positive.

Rule:

+ × + = +

+ × - = -

- × + = -

- × - = +

5 0
2 years ago
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