189 (+20), 209 (+40), 249 (+80), 329 (+160), 489 (+320), 809 (+640), 1449...
We are adding twice what we added to the previous number. Each time we double what we're adding.
Answer:
5
Step-by-step explanation:
34.05
34.05 x 10 to the power of six = 3405000
decimal point needs to move 5 places to go after the last zero
Answer:
False
Step-by-step explanation:
a millisecond (ms or msec) is one thousandth of a second
0.9/5=0.18
2.4/12=0.2
so the first one is better
Answer:
B: 54
Step-by-step explanation:
for the first digit: 1 or 3 (2 choices)
for the second digit: 0, 1, or 3 (3 choices)
for the third digit: 0, 1, or 3 (3 choices)
for the forth digit: 0, 1, or 3 (3 choices)
2×3×3×3=54
