An rock is thrown upward from a platform that is 188 feet above ground at 80 feet per second. Use the projectile formula to dete
rmine when the rock hit the ground.
1 answer:
Answer:
6.74 s
Step-by-step explanation:
y = ½ at² + vt + h
Given a = -32, v = 80, h = 188:
y = ½ (-32) t² + (80) t + (188)
y = -16t² + 80t + 188
When y = 0:
0 = -16t² + 80t + 188
0 = 4t² − 20t − 47
Solve with quadratic formula:
t = [ -(-20) ± √((-20)² − 4(4)(-47)) ] / 2(4)
t = [ 20 ± √(400 + 752) ] / 8
t = (20 ± √1152) / 8
t > 0, so:
t = (20 + √1152) / 8
t ≈ 6.74
You might be interested in
Answer:
the answer should be (3,-2)
Answer:
A) 1/5
Step-by-step explanation:
Points on the graph: (10, 2) and (20, 4)
Slope:
m=(y2-y1)/(x2-x1)
m=(4-2)/(20-10)
m= 2/10
m = 1/5
Answer: 9 month
Step-by-step explanation:
1. 35x < 315 = let x be the number of month
2. x < 9 = divide both sides by 35
result. 9 month
The exact number is 121.966019, so if you round to the nearest whole number, the answer is 122.
Answer:
a. SAS
b. SSS
c. SSA
d. AAS
e. SAS
f. ASA
g. ASA
h. SAS
Step-by-step explanation:
