Hellllllpppp

[marleca]

Okay, this problem is algebra 2 but, I attempted to do some work on it but.... im stuck. It reads: the height of a diver jumping from a diving platform is about h= -16.1t^2 +11t+34.3


Where h is the height of the diver in feet above the water and t is the time measured in seconds, when diving from a platform about 34.3 feet above the water with an upward initial velocity of 11 ft/sec.


question: After how many seconds is the diver's height above the water 7 feet?
After how many seconds is the diver's height above water 36 feet?


*I set the whole thing up as an equation as I was taught in algebra 2 however, when I referred to my notes... we did not have 3 numbers on the right side of the equation... so, I attempted to solve it and I stopped at 27.3= -16.1t^2 +11t

 

[mmm4444bot]

Did they actually give you -16.1t^2 as the first term in the function for h?

(That's not correct, for planet Earth.)

Also, you typed the phrase "about 34.3 above the water 7 feet". Can you rephrase this?

Please tell us whether you know how to solve an equation using the Quadratic Formula.

 

[marleca]

Did they actually give you -16.1t^2 as the first term in the function for h?

(That's not correct, for planet Earth.)

Also, you typed the phrase "about 34.3 above the water 7 feet". What does that mean?

Please tell us whether you know how to solve an equation using the Quadratic Formula.

Sorry, I fixed it. and yes.... -16.1 h^2 is the first term of the function. and I do know how to solve the quadratic formula but, I can not exactly recall how to do it

 

[Deleted member 4993]

Okay, this problem is algebra 2 but, I attempted to do some work on it but.... im stuck. It reads: the height of a diver jumping from a diving platform is about h= -16.1t^2 +11t+34.3


Where h is the height of the diver in feet above the water and t is the time measured in seconds, when diving from a platform about 34.3 feet above the water with an upward initial velocity of 11 ft/sec.


question: After how many seconds is the diver's height above the water 7 feet?
After how many seconds is the diver's height above water 36 feet?


*I set the whole thing up as an equation as I was taught in algebra 2 however, when I referred to my notes... we did not have 3 numbers on the right side of the equation... so, I attempted to solve it and I stopped at 27.3= -16.1t^2 +11t

h= -16.1t^2 +11t+34.3

7 = -16.1 * t^2 + 11 * t + 34.3

16.1 t^2 - 11 t - 27.3 = 0

Now refresh your knowledge regarding quadratic equation/formula go to:

http://www.purplemath.com/modules/solvquad4.htm