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Sagot :
Answer:
- 5 ft 8 in or 68 in
Step-by-step explanation:
In 4 seconds the rock will be at:
- 2*4 = 8 in from the surface
Add 5 feet to this to get the required distance:
- 5 ft + 8 in = 5*12 in + 8 in = 68 in
Distance after 8s:-
[tex]\\ \rm\longmapsto 4(-2)=-8in[/tex]
Now
Distance:-
[tex]\\ \rm\longmapsto 5-(-8)[/tex]
[tex]\\ \rm\longmapsto 5ft+8in[/tex]
- 1ft=12in
[tex]\\ \rm\longmapsto 5ft+3/4ft[/tex]
[tex]\\ \rm\longmapsto 23/4ft[/tex]
[tex]\\ \rm\longmapsto 5.7ft[/tex]
- Convert to in
[tex]\\ \rm\longmapsto 5.7\times 12[/tex]
[tex]\\ \rm\longmapsto 68in[/tex]
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