Age
True
16 there you gooooooooo
Answer:
(a) t = 7 sec approximately; (b) t = 6 sec
Step-by-step explanation:
(a) Set h(t)= -16(t-3)^2 + 288 = 0 and solve for t:
16(t-3)^2 = 288
After simplification, this becomes (t - 3)^2 = 18, or t - 3 = ±3√2.
Because t can be only zero or positive, t = 3 + 3√2 = 7 seconds
(b) Solve h(t)= -16(t-3)^2 + 288 = 150:
-16(t-3)^2 = - 162
or (t - 3)^2 = 10.125, or
t - 3 = ±3.18, or, finally, t = 6.18 sec (discard t = -0.18 sec)
Answer:60
Step-by-step explanation: 40/8•12 =60
Answer:
12 2/3 km per hour
Step-by-step explanation:
What is Harveys speed?
Take the distance and divide by the time
3 1/6 km
--------------
1/4 hour
Change the mixed number to an improper fraction
3 1/6 = (6*3+1)/6 = 19/6
19/6 km
--------------
1/4 hour
Copy dot flip
19/6 * 4/1 = 76/6 = 38/3 km/hr
3 goes into 38 12 times (12*3 = 36) with 2 left over
12 2/3 km per hour