Answer:
t is between 0.47 seconds and 4.02 seconds
Step-by-step explanation:
Given

Required
Determine the values of t

Subtract 10 from both sides


Multiply through y -1

Solve t using quadratic formula:

Where



So, we have:




Split the equation
or 
or 
or 
or 
Hence; the range is

Answer: I think the answer is A I might be wrong but I'm 90% sure this is right mark me BRAILIEST PLS
Step-by-step explanation:
Find the probability of obtaining 3 heads when flipping 4 coins
Answer:
2.1 hrs
Step-by-step explanation:
In 1 hr, Phillip would have proofed 1/7 of the chapter. In 1 hr, Kim would have proofed 1/3 of the chapter. So, together in 1 hr, they would have proofed 10/21 of the chapter. So, it would take 21/10 or 2.1 hrs to proof the whole chapter together.
Answer:
3rd option
Step-by-step explanation:
Since 8 minutes is included, do the closed circle. He put it in there for 8 minutes, than put it in there for longer which makes the graph go to the right with including the closed circle. Hope this helped!