9514 1404 393
Answer:
15 seconds
Step-by-step explanation:
Put the given heights in the equation and solve for t.
h(t) = -16t² +3600
0 = -16t² +3600 . . . . h(t) = 0 at ground level
16t² = 3600 . . . . . . . add 16t²
t² = 3600/16 = (60/4)² = 15² . . . . . divide by 16
t = 15 . . . . . . . . . . . . take the square root
It will take 15 seconds for the phone to hit the ground.
Answer:
1.68
Step-by-step explanation:
log723.7=2.86
multiplication in log is addition so 2.86+
log0.0667=-1.18
so 2.86+-1.18=1.68
Answer:
Step-by-step explanation:
( 
) =
Answer: It will take her 15 more hours to finish the book.
Step-by-step explanation:
25% : 5h
50% : 10h
75% : 15h
100% : 20h
It would take 20 hours to complete the book, but because she already read for 5 hours, it would be 15 to finish the book.
100 x 8=800 800/80=10 which means the full distance is 10km
