The amount of radioactive material that would remain by the 7th hour of decay is 0.12 grams.
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Exponential function</h3>
An exponential function is in the form:
y = abˣ
where y,x are variables, a is the initial value and b is the multiplicative factor.
Let y represent the amount of substance remaining after x hours. Hence:
a = 9375, at x = 4, y = 15:
15 = 9375(b)⁴
b = 0.2
y = 9375(0.2)ˣ
For the 7th hour, x = 7:
y = 9375(0.2)⁷ = 0.12
The amount of radioactive material that would remain by the 7th hour of decay is 0.12 grams.
Find out more on Exponential function at: brainly.com/question/12940982
Answer:
0.86 x 0.24 = 0.2064
Step-by-step explanation:
1. Write the number in exponential form with a base of 8.
2. Reduce the index of the radical and exponent with 2.
3. Your answer is 8
I hope this helps☺
Sorry, I didn't read the question fully. I don't know how to do this. Please disregard my previous answer.
The standard form for 2 tens and 1 ones (21) times 10 is 210
