Answer:
15/20(=3/4)
Step-by-step explanation:
3/4-2/5+8/20=...
15/20-8/20+8/20=15/20
Answer:
c) the marble is either red or green?
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
Multiply the mantissas: 4.2 x 3.7 = 15.54, add the exponents 5+6= 11 so 15.54 x 10^11, BUT WAIT, there can only be one digit in from to the decimal, so 1.554 x 10^12 (add 11 + 1 decimal place change, so 12)
