<h3>
Answer: C. 13</h3>
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Explanation:
In general if we have these two vectors
u = (a,b)
v = (c,d)
Then the dot product of them is
u dot v = a*c + b*d
We multiply the corresponding coordinates, then add up the products.
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In this case,
u = (3,2)
v = (1,5)
u dot v = 3*1+2*5
u dot v = 3 + 10
u dot v = 13
(a is the length of the side of each edge of the cube)<span>In words, the surface area of a cube is the area of the six squares that cover it. The area of one of them is a*a, or a<span> 2</span> . Since these are all the same, you can multiply one of them by six, so the surface area of a cube is 6 times one of the sides squared.</span>
Answer:
last option.
Step-by-step explanation:
See attached.
I'm not sure why you crossed out the last option, but it seems to be correct.
Answer:
+9
Step-by-step explanation:
Charge of the nucleus = + number of protons
Answer:
a) 250
b) 125
Step-by-step explanation:
For a, the answer is 250 because if 2 regions are labelled 6, and there are 6 regions, and the spinner is spun 750 times, then we will multiply 2 by 750 and divide the answer by 6.
2 x 750 = 1500
1500/6 = 250
Now, for b, the answer is 125 because 3 is the only prime number there and only one region is labelled 3. So we multiply 1 by 750 (which is 750) and divide by 6.
750/6 = 125.
a = 250
b = 125
