A is your answer
We can cross multiply using x/70=30%/100
Solving it we get:
100x=2100 (70 times 30)
x=21
So we get a, 21 as your answer.
I hope this helped!
-24ab^2
Is the answer
Hope this helps.
u have to calcuate there outsides by multiplying
60x24=1,440
103,680/1,440=72 beats per minute
an average human heart beats 72 to 80 beats per minute
