Which cells have plasma membranes
All cells have plasma membranes. The plasma membrane is a semipermeable membrane that surrounds the cytoplasm of a cell and serves as a barrier, regulating the passage of substances in and out of the cell.
A projectile is launched into the air from the ground. The table shows the height of the projectile, h(t), at different times.
Time: 5, 10, 15, 20, 25, 30, 35
Height: 1,353, 2,460, 3,323, 3,940, 4,313, 4,440, 4,323
Estimate the amount of time in seconds it took for the projectile to reach the ground.
A. 10 seconds
B. 60 seconds
C. 175 seconds
D. 85 seconfs
To estimate the amount of time it took for the projectile to reach the ground, we would look for the time when the height of the projectile is closest to zero.
Given the data provided:
Time: 5, 10, 15, 20, 25, 30, 35
Height: 1,353, 2,460, 3,323, 3,940, 4,313, 4,440, 4,323
The height of the projectile is closest to zero at time t = 30 seconds, where the height is 4,440.
Therefore, it took approximately 30 seconds for the projectile to reach the ground.
The closest answer option is:
D. 85 seconds
However, the correct estimation based on the data is 30 seconds.