Answer:
5 seconds
Step-by-step explanation:
H= -16t2 + 400
Hit ground
H=0
0 = -16t2 + 400
0 = -16 ( t2 - 25)
-16
t2 -25 = 0
(t + 5)(t - 5) = 0
t + 5 = 0
- 5 -5
t = -5
t - 5 = 0
+ 5 +5
t = -5
t = 5
5 seconds to hit the ground
Answer:
the first one i think
Step-by-step explanation:
i can't see the pic clearly make it better, and i will solve for u
Answer:
$180
Step-by-step explanation:
To calculate how much money she has saved, we can use the following information:
-> She wants to save a total of $300.
-> She reached 60% of her goal this month, so she saved already 60% of the total.
Then, we just need to know how much is 60% of 300, as that's the value she already saved:
60% of 300 = 300 * 60/100 = 180
She saved $180.
Answer:
0.87
Step-by-step explanation:
y = ab^x
b is the rate of decay if it is between 0 and 1. Here, b = 0.87.
Answer: 0.87