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laurentsupreme
12.08.2020 •
Mathematics
What is this answer I need help please.
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Ответ:
972π in³
Step-by-step explanation:
Volume of Sphere Formula: V = 4/3πr³
d = 2r
Step 1: Find radius r
18 = 2r
r = 9
Step 2: Plug into volume formula
V = 4/3π(9)³
Step 3: Simplify
V = 4/3π(729)
V = 972π
Ответ:
a. There is nothing wrong with Mary's reasoning b. 2 water lilies.
Step-by-step explanation:
a. This is because, she reasons that if she doubles the amount of water lilies she buys, it would take half the time it takes to produce 10,000 lilies. So, there is nothing wrong with Mary's reasoning.
b. Since it takes 1 water lily to produce 10000 lilies in 20 days, 1 water lily will produce x lilies in 10 days.
So, x = 10000 × 10/20 = 5000 lilies
So, 1 water lily produces 5000 lilies in 10 days.
So, x water lilies will produces 10000 lilies in 10 days.
So x = 10000 × 1/5000 = 2 water lilies
So, 2 water lilies will produce 10000 lilies in 10 days.
So, Mary needs 2 water lilies so she can meet her goal of having the pond surface covered in 10 days.