Answer:
-4
Step-by-step explanation:
16-20 = -4
16 a. -5·4⁻⁴ = -0.01953125
16 b. 7·4⁻³ = 0.109375
16 a. -5·4⁻⁴ is the same as -5 / 4⁴ is the same as -5/256
the same applies to b. raise to a negative exponent is the same as placing that factor in a denominator.
hope it helps
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450,425
2000 1200 800 600 500 450 425
-800 -400 -200 -100 -50 -25
÷2 ÷2 ÷2 ÷2 ÷2
GCF is 6
factors are 1,2,3,6
