Divide total earned by number of hours:
10.26/3 = $3.42
She earned $3.42 per hour
The half life of the radioactive isotope to the nearest tenth is 0.83 days.
<h3>What is rate of radioactive decay?</h3>
The rate of radioactive decay is the rate at which a radioactive isotope is disintegrated. The half life is the time taken for half of the original amount of radioactive isotope to remain.
Given that;
t/12 = 0.693/k
Where;
t1/2 - half life
k =decay constant
t/12 = 0.693/0.84
t/12 = 0.83 days
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Y+1>_4
sum= addition
greater tan or equal to means it has this symbol > with a line underneath it
Answer:
Ellie drove 90 miles in three hours.
Step-by-step explanation: