Answer:
0.69s
2.31s
Step-by-step explanation:
Given in the question an equation
h = 1 + 15t - 5t²
The problem asks for a time when the ball's height will be 9 m. To find these times, I plug 9 in for h and solve for t:
8 = 1 + 15t - 5t²
-5t² + 15t + 1 - 9 = 0
-5t² + 15t - 8 = 0
Using the quadratic equation:
t = -15 ± √15²-4(-5)(-8) / 2(-5)
t = -15±√65 / -10
t = -15 + √65 / -10 or t = -15 - √65 / -10
t = 0.69 seconds or t = 2.31 seconds
So, the ball is at a height of 9m twice: once on the way up after 0.69 seconds and once on the way back down after 2.31 seconds.
Answer:
C
Step-by-step explanation:
i think
Answer:
A. (0, -6)
Step-by-step explanation:
when x is 0, there has to be a y-int. As shown in the table, it is -6. Therefore the answer is A
2783- The 2 is in the thousands place so the value is 2*1000= 2000
7283- Thw 2 is in the hundreds place so the value is 2*100= 200
2000/200=10
Final answer: The value of 2 in the number 2783 is 10 times the value of the 2 in the number 7283.
-25 is less than 16 because it’s a negative number