The answer is A.
You put the numbers in order of the letters and if a letter is missing you put 0
If 1km is equal to 0.6mi then 5km is equal to 3mi
A . B = AxBx + AyBy + AzBz
s = 7i + j
t = 4i -9j
s.t = 7.4 + 1.-9
s.t = 28 - 9 = 19
Answer : 7,889
Hundreds digit : 800
Tens digit : 80
800 ÷ 80 = 10 (800, the hundreds digit, is 10 times as great as the tens digit, 80)
Answer:
72mm
Step-by-step explanation:
it is 72mm because there are 6 cubes and they each are 12mm so you do 6*12 witch is 72