Question

Notand cu mg media proportionala a numerelor a si b, sa se afle b stiind ca:
a) a= 4 intregi si 4/5 si mg=12
b)a= 0,1 si mg=0,11
c)a= 10 intregi si 15/16 si mg= 8 intregi si 3/4
d) a= 3,47(2) si mg= 4,1(6)

Answer 1

mg=√a×b

a)
a= 4 intregi si 4/5=24/5
mg=12=√144=√24/5×b
b=144:(24/5)=144×5/24=30

b)a= 0,1
 mg=0,11=√0,0121=√0,1×b
b=0,0121:0,1=0,121

c)a= 10 intregi si 15/16=175/16
mg= 8 intregi si 3/4=35/4=√1225/16=√175/16×b
b=(1225/16):(175/16)=1225/16×16/175=1225/175=7

d) a= 3,47(2)=(3472-347)/900=3125/900=125/36
mg= 4,1(6) =(416-41)/90=375/90=25/6=√625/36=√125/36×b
b=625/36:125/36=625/36×36/125=5