Astone falls from the top of a cliff into the ocean. in the air, it had an average speed of 1616 \text{m/s}m/s. in the water, it had an average speed of 33 \text{m/s}m/s before hitting the seabed. the total distance from the top of the cliff to the seabed is 127127 meters, and the stone's entire fall took 1212 seconds. how long did the stone fall in air and how long did it fall in the water?

time in air is 7 seconds

Time in water is 5 seconds

Step-by-step explanation:

Let's assume

time took in air =t seconds

we are given

the stone's entire fall took 12 seconds

so, time took in water =12-t

now, we can find distance traveled in air

In the air, it had an average speed of 16m/s

time took in air =t seconds

we know that

distance = speed *time

distance  in air= 16*t

In the water, it had an average speed of 3m/s

time took in water =12-t

we know that

distance = speed *time

distance in water= 3(12-t)

now, we can find total distance

total distance = distance in air + distance in water

so, total distance =16t+3(12-t)

we are given

total distance =127

we can set them equal

now, we can solve for t

now, we can find time took in water

time took in water=12-7=5

d) 48

step-by-step explanation:

16,32,48,64,80,96,112,128,144,160,176,192,208,224,240,256,272,288,304,320,336

answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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rauschg

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step-by-step explanation: