Answer:
t = 2.52 seconds
Step-by-step explanation:
h=139-15t-16t^2
We want to know when the ball hits the ground
That would be when h=0
0 = 139-15t-16t^2
We can use the quadratic formula to find t
t = -b ± sqrt(b^2-4ac)
----------------------
2a
where a = -16 b = -15 and c = 139
t = -(-15) ± sqrt((-15)^2-4(-16)139)
----------------------
2(-16)
t = (15) ± sqrt(225+8896)
----------------------
-32
t = (15) ± sqrt(9121)
----------------------
-32
t = 15+ sqrt(9121) t = 15- sqrt(9121)
-------------------- or -------------------
-32 -32
-3.453247707 or 2.515747707
Since time cannot be negative
2.515747707
Round to the nearest hundredth
t = 2.52 seconds
Answer:
decreasing
Step-by-step explanation:
since its negative it will slope down
Answer:
hello dude you see um this is complicated
Step-by-step explanation:
Answer:
The Moon's diameter is greater than 
miles
Step-by-step explanation:
we know that
by proportion
Find the Moon's diameter
Let
x-----> the Moon's diameter in inches
Compare
therefore
The Moon's diameter is greater than miles
0.004 is one tenth of 0.04 or 0.04 is ten times 0.004
