Answer:
Step-by-step explanation:
We'd solve the exponents first:
Subtract:
7776 - 1296 = 6480
Divide:
We already know
Our answer is
Take any 2 points and find the slope of the line connecting them:
<span>1 9
3 8
9-8 1
slope m is m = ------- = -------- = -1/2
1-3 -2</span>
Answer: 0.87 times per second (Or 52.2 times per minute)
Step-by-step explanation:
You need to make the conversion from minutes to seconds.
Remember that 1 minute has 60 seconds. Then 20 minutes to seconds is:
Find the number of times the heart beats in 1 second when it is rowing:
Find the number of times the heart beats in 1 second when it is resting:
Then the difference is:
(Or 52.2 times per minute)