Answer:
ima probably fail I've been on this app just to get my grades up
Step-by-step explanation:
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Answer:
no
Step-by-step explanation:
(2.5×10⁻⁸)(9×10⁻¹⁰) = 2.5×9×10⁻⁸⁻¹⁰ = 22.5×10⁻¹⁸
= 2.25×10⁻¹⁷
_____
The rules of exponents apply.
... 10^a × 10^b = 10^(a+b)
... 22.5 = 2.25 × 10¹
42 = 2(W+L)
21= (W+L)
L= 3+5W)
21= W +(3+5W)
21= 3+6W
21-3=6W
18=6W
W=18/6
=3
Answer:
w = PERIMETER/2 - LENGTH
<u>w = 42/2 - (3+5w)</u>
PS. I THINK THIS IS RIGHT. NOT TOO SURE, BUT MOST LIKELY.
