Asample of a radioactive material decays over time.
!

D  10 is the size of the sample at the time it was discovered

Step-by-step explanation:

An exponential equation is written in the form

y = ab^x

where a is the initial value

b is  the growth or decay

x is the amount of time

y = 10 (.5)^x

10 is the initial value

.5 is how fast it is decaying (50 % decay rate)

x is the time in days

let's solve your equation step-by-step.

4x+2=2x+12

step 1: subtract 2x from both sides.

4x+2−2x=2x+12−2x

2x+2=12

step 2: subtract 2 from both sides.

2x+2−2=12−2

2x=10

step 3: divide both sides by 2.

2x

2

=

10

2

x=5

step-by-step explanation: