SOLUTION: Throwing a wrench: An angry construction worker throws his wrench from a height of 128 feet with an initial velocity of 32 feet per second. The height of the wrench above the gro
Algebra ->
Customizable Word Problem Solvers
-> Travel
-> SOLUTION: Throwing a wrench: An angry construction worker throws his wrench from a height of 128 feet with an initial velocity of 32 feet per second. The height of the wrench above the gro
Log On
Question 174164This question is from textbook Basic and Intermediate Algebra
: Throwing a wrench: An angry construction worker throws his wrench from a height of 128 feet with an initial velocity of 32 feet per second. The height of the wrench above the ground after t seconds is given by S(t)--16t^2-32t + 128.
a) What is the height of the wrench after 1 second?
b) How long does it take for the wrench to reach the ground?
I would like a confirmation or correction to my solutions below:
a) S= (-16t^2-32t+128)
-16-1^2(-32*1)+128
-16(1^2)+ or 1 32(1) + 128 = 80 ft
b) 0= -16t^2-32+128
-16t^2/-16 = 0
-16t^2/-16 = t^2
-32/-16 = +2
128/-16= -8
0=t^2+2t-8=
(t+4)*t-2 =0
t= -4 or t =2
t = 2 seconds This question is from textbook Basic and Intermediate Algebra
(