Question

a toy rocket is pumped full of air and released upward. Its height can be approximated using the relation H=-7t squared + 42t + 49 where h is the height above ground in metres and t is the time in seconds

Answer 1

whats the question here singh?

Answer 2

your gonna awnser it

Answer 3

a toy rocket is pumped full of air and released upward. Its height can be approximated using the relation H=-7t squared + 42t + 49 where h is the height above ground in metres and t is the time in seconds

Answer 4

H=-7t^2 + 42t + 49
H=0, When -7t^2 + 42t + 49=0, t=7sec and t=-1sec so after 7 sec the toy rocket is in the ground

Answer 5

how long after the launch did the rocket hit the ground explain

Answer 6

after t=7sec the rocket hits the ground

Answer 7

what time has passed when the rocket has reached its highest point

Answer 8

H=-7t^2 + 42t + 4=0, that is solving for t in sec

Answer 9

may i know if you are in the calculus class or algebra?

Answer 10

algebra

Answer 11

ya so whats the awnser

Answer 12

what time has passed when the rocket has reached its highest point

Answer 13

ok... from H=-7t^2 + 42t + 49, this is a quadratic equation and a=-17,b=42 and c=49... the velocity equation is V=2ax+b=2(-7)t+42=-14t+42
now at max height V=0=-14t+42 we get t=3sec that is when the rocket reached its max height
and the max height H=-7(3)^2 +42(3)+49=112 metres answer

Answer 14

any question?

Answer 15

Explain what happens to the graph of the exponential relation 2^x to the right of the y axis?

Answer 16

meant to say 2 to the power of x

Answer 17

?

Answer 18

are u there