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Algebra
Pregunta

A ball is thrown in the air from a platform \( 4 \...A ball is thrown in the air from a platform \( 4 \) meters above a river, at an initial velocity of \( 30 m / s \) , and its height above the river can be determined by the formula \( h ( t ) = - 4.9 t ^ { 2 } + 30 t + 4 \) . 

a. Graph the function in DESMOS, then answer the following questions. Copy-paste the URL here. 

b. When is the ball \( 7 m \) above the river? (two answers here, please) 

c. Does it reach \( 50 m \) above the river? 

d. When does it hit the water? 

Answer

a.  

 

b. 0.1017,  6.021

c. yes

d.  6.253

Solución
View full explanation on CameraMath App.