Answer:
D) 9 postcards with 2 shells each.
Explanation:
9 x 2 = 18
Therefore, 9 postcards with 2 shells each is the correct answer.
Please give brainliest.
Answer:
The answer is choice B: 22.52 units.
Step-by-step explanation:
We use the Pythagoras's theorem which says for a right triangle with sides 
and hypotenuse 
:
In our case
So we solve for 
Which is choice B.
From 2.56 to 3.18; 3.18-2.56=0.62 increased
so if 2.56 represented 100%
0.62 represents ? %
cross multiply
?%= 0.62·100/2.56=24.21875 which rounded to the nearest whole is 24%
Answer is B).
The speed is 630mp/s I think. Because you have to multiply Wavelength by Frequency to get true speed
