30 is the answer. You do 10X 3 which is 30- 2 which is 28 and 28 to the nearest 10th is 30
Answer:

Step-by-step explanation:
<u>Step 1: Find the square root of 81</u>
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Answer: 
Answer: 10:30 a.m. will be the time where there are 64 cells in the bottle
Step-by-step explanation:
Answer:
$225.50 (nearest cent)
Step-by-step explanation:
1 foot ≈ 0.3048 m
Width of room = 15 ft ≈ 15 x 0.3048 = 4.572 m
Length of room = 18 ft ≈ 18 x 0.3048 = 5.4864 m
Area of room = width x length = 4.572 x 5.4864 = 25.0938208... m²
Cost of carpet = $8.99 per m²
Total cost of carpet = 25.0938208 x 8.99 = $225.50 (nearest cent)