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Gennadij [26K]
3 years ago
6

the height in feet above the ground of an arrow after it is shot can be modeled by y=-16r^2+63r+4.Can the arrow pass over a tree

that is 68 feet tall? Explain.
Mathematics
1 answer:
miss Akunina [59]3 years ago
7 0

Answer:

yes

Step-by-step explanation:

y=-16r^2+63r+4

maximum value of y :

y'=0

-32r +63=0

r= 63/32

y = -16(63/32)²+63(63/32)+4

= -4 + 124 + 4 = 124 ft

124 > 68

the Arrow can pass over the tree

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6 0
4 years ago
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the area of John's garden is the same size of Sarah's garden. John's garden has a width of 9 meters, and Sarah's garden has a wi
Alekssandra [29.7K]

The combined area of both gardens is 72 square meters.

Step-by-step explanation:

Given,

Width of John's garden = 9 meters

Width of Sarah's garden = 6 meters

Let,

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Length of John's garden = l+2

It is given that area of both gardens is same,

Area of Sarah's garden = Area of John's garden

Length * Width = Length * Width

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Dividing both sides by 3

\frac{3l}{3}=\frac{12}{3}\\l=4

Length of John's garden = 4 meters

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4 0
4 years ago
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Diano4ka-milaya [45]

Answer:

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Step-by-step explanation:

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Answer:

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