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Alinara [238K]
3 years ago
14

A ball is thrown from an initial height of 3 feet with an initial upward velocity of 30/fts . The ball's height h (in feet) afte

r t seconds is given by the following. h= 3+30t-16t^2 Find all values of t for which the ball's height is 16 feet. Round to the nearest hundredth
Mathematics
2 answers:
Vlad [161]3 years ago
6 0
At 16 feet we have
16 = 3 + 30t - 16t^2

16t^2 - 30t + 13 = 0

t  = [- -30 +/- sqrt(30^2 - 4*16*13) ] / 32

t  = 1.20 , 0.68 seconds  answer   ( correct to the nearest hundredth)
vovikov84 [41]3 years ago
3 0
0.68 or 70 I think not to sure
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77julia77 [94]
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3 years ago
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3 years ago
Read 2 more answers
Y varies directly as z, y=180, z=10 , find ywhen z=14
FinnZ [79.3K]

<h2>y = 252</h2>

Step-by-step explanation:

To find the value of y when z = 14 we must first find the relationship between them

The statement

y varies directly as z is written as

y = kz

where k is the constant of proportionality

when y = 180

z = 10

180 = 10k

Divide both sides by 10

k = 18

The formula for the variation is

y = 18z

When z = 14

y = 18(14)

<h3>y = 252</h3>

Hope this helps you

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3 years ago
Pi High school ordered 40 science books. The next week, the school ordered 30 algebra books. The bill for the first order was $3
Darina [25.2K]
40s=360+30a
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40s=360+30a
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s = 9+3/4a

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360+30a+30a=$3960
360+60a=$3960
360-360+60a=$3960
60a=$3960
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a= $60
The algebra book is $60



4 0
3 years ago
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