Question

Help me with question number 1 am very confused

Answer 1

0.15 x 10^3 just means that you will move 3 decimal places to the right.

So we get 150

Answer 2

I can easily give you just the answer but that won't help you so I will give you the steps:
0.15x10 (to the 3rd power)
which means the little three next to the 10.
step 1: multiply 10x10x10
why three times? because of the little 3. the 10 symbolizes base and the little three symbolizes an exponent- to the 3rd power.
step2: the answer 10x10x10= 1000
so now, multiply it.
step 3: 0.15x1000=
150
Glad I could help!