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It’s obviously 15 because if you add all of the sides together you get red and r = 15, so it would be 15/26
Answer:
C. 30in
Step-by-step explanation:

x = 30
They sell 18 costumes per day, times 5 days.
So,
18 costumes per day * 5 days
18*5 =90
(4.3×10²) × (4.0×10⁻³) in scientific notation?
(4.3 x 4.0) x (10² x 10⁻³) = 17.2 x (10² x 10⁻³) =
= 17.2 x 10²⁻³ = 17.2 x 10⁻¹ = 1.72 x 10¹ x 10⁻¹ = 1.72 x 10¹⁻¹ = 1.72 x 10⁰ = 1.72 x 1
Answer : 1.72 x 10⁰ = 1.72
Hope this helps!