please answer the questions
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answer 1:
a)9.5*10^11= 950000000000
answer 2:
a)256.9*10^-9
b)1.285*10^10
answer 3:
a)9/8 ^-5× 9/8^-3= 9/8^-5+-3
9/8^-3-5= 9/8^-8
answer 4:
(-4/11)^-5*(33/20)^-5= (-4/11×33/20)^-5
=(-3/5)^-5
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