Answer: 15 lines of symmetry.
Step-by-step explanation:
Answer:
0.4:1
Step-by-step explanation:
1400mg/1000=1.4kg
1.4:3.5
0.4:1
Basically it would be a compass is used to copy angles haha.
Answer:
50 Db
Step-by-step explanation:
we know that
The loudness in decibels is given by the formula

where
I = sound intensity in watts per square meter (Watts/m^2)
I₀ = reference intensity, = 10^(-12) Watts/m^2
so
For I=10^(-7) Watts/m^2
substitute in the formula above and solve for L



Can't see all the options.
However, I'll guess and suggest B.
Not sure if this helped at all :P