Written in scientific notation that is:
<span>86,900.4
= 8.6x10^4</span>
Exponential decay formula is :
Where a≠0, b≠1 , b represent growth or decay factor (or rate) and x is any real number.
But if a radioactive isotope decays in half every year which means the decay factor or decay rate is 50% or
.
So, the formula for half decay will be:

Where
represent c) The rate of isotope decreases.
Answers: There is no image for me to see the points A,B,C and D. Therefore, I can't answer numbers 1 and 2.
ANSWER TO: Which statement is true about the ordered pair (1.5,- 0.5) ?
The correct answer to this one is <u>B</u>.
ANSWER TO: The following points are plotted on a coordinate plane: (-1, 2 ), ( - 1, 7), and (4, 2). If the points are connected by straight lines, which shape will they form?
The correct answer to this answer is <u>B</u>, please see the attached file below.
ANSWER TO: Which of the following coordinates can be added to the coordinate plane to create a trapezoid?
ERROR: This question is way too confusing for one person. Please reword it, have a nice day.
Answer:
x = -7
Step-by-step explanation:
8x - 9 = 12 + 11x
Subtract 11x to both sides of the equation. Then, it will look like this:
-3x - 9 = 12
Add 9 to both sides of the equation. After that, it will look like this:
-3x = 21
Divide both sides of the eqution by -3. Your answer is:
x = -7