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h = -4.9t +27t +2.4 ( h is in meters )


For how long is the balloon more than 3m high?

Sagot :

Paulinapodlesskayaidn
-4.9t+ 27t= 22.1t  A=22.1t + 2.4 (you cant add it any farther because they dont have a varible in common)

IGreenidn
Plug in 3 for the height:

3 = -4.9t + 27t + 2.4

Combine like terms:

3 = 22.1t + 2.4

Subtract 2.4 to both sides:

0.06 = 22.1t

Divide 22.1 to both sides:

t = .00271493213
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